XCodeで Class ○○ is implemented in both ○○ and One of the two will be used. Which one is undefined.が出るときの対処法

はじめに

表題の通り、XCodeでアプリを動かした時に以下のエラーが多発しました。
(似た人の救済になれば…なので、量が多いですが全文載せておきます)

Class FIRAnalyticsConnector is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0c850) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3c38). One of the two will be used. Which one is undefined.
Class FIRConnectorUtils is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0c8a0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3c88). One of the two will be used. Which one is undefined.
Class FIRAIdentifiers is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0c918) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3d00). One of the two will be used. Which one is undefined.
Class FIRAConditionalUserProperty is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0c968) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3d50). One of the two will be used. Which one is undefined.
Class FIRAConditionalUserPropertyController is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0c9b8) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3da0). One of the two will be used. Which one is undefined.
Class FIRAEvent is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0ca08) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3df0). One of the two will be used. Which one is undefined.
Class FIRAUserAttribute is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0ca58) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3e40). One of the two will be used. Which one is undefined.
Class FIRAValue is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0caa8) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3e90). One of the two will be used. Which one is undefined.
Class FIRAAdExposureReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0caf8) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3ee0). One of the two will be used. Which one is undefined.
Class FIRAMeasurement is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0cb20) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3f08). One of the two will be used. Which one is undefined.
Class FIRASessionReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0cb98) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3f80). One of the two will be used. Which one is undefined.
Class FIRAnalytics is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0cbc0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a3fa8). One of the two will be used. Which one is undefined.
Class FIRAScreenViewReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e0cc38) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4020). One of the two will be used. Which one is undefined.
Class APMAdExposureReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e102c0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4048). One of the two will be used. Which one is undefined.
Class APMAlarm is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10310) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4098). One of the two will be used. Which one is undefined.
Class APMAnalytics is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10360) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a40e8). One of the two will be used. Which one is undefined.
Class APMAudience is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e103b0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4138). One of the two will be used. Which one is undefined.
Class APMDatabase is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10400) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4188). One of the two will be used. Which one is undefined.
Class APMEnvironmentInfo is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10450) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a41d8). One of the two will be used. Which one is undefined.
Class APMIdentity is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e104a0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4228). One of the two will be used. Which one is undefined.
Class APMMeasurement is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e104f0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4278). One of the two will be used. Which one is undefined.
Class APMMonitor is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10540) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a42c8). One of the two will be used. Which one is undefined.
Class APMPersistedConfig is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10590) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4318). One of the two will be used. Which one is undefined.
Class APMRemoteConfig is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e105e0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4368). One of the two will be used. Which one is undefined.
Class APMScheduler is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10630) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a43b8). One of the two will be used. Which one is undefined.
Class APMSessionReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10680) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4408). One of the two will be used. Which one is undefined.
Class APMIdentifiers is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e106d0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4458). One of the two will be used. Which one is undefined.
Class APMSearchAdReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10720) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a44a8). One of the two will be used. Which one is undefined.
Class APMAppDelegateInterceptor is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10770) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a44f8). One of the two will be used. Which one is undefined.
Class APMAudienceComparisonValues is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e107e8) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4570). One of the two will be used. Which one is undefined.
Class APMAudienceTimestampsCache is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10810) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4598). One of the two will be used. Which one is undefined.
Class APMSequenceTimestampsCache is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10860) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a45e8). One of the two will be used. Which one is undefined.
Class APMConditionalUserProperty is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e108b0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4638). One of the two will be used. Which one is undefined.
Class APMConditionalUserPropertyController is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10900) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4688). One of the two will be used. Which one is undefined.
Class APMAppMetadata is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10950) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a46d8). One of the two will be used. Which one is undefined.
Class APMDailyCounts is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e109a0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4728). One of the two will be used. Which one is undefined.
Class APMDataTypeValidator is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e109f0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4778). One of the two will be used. Which one is undefined.
Class APMEvent is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10a40) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a47c8). One of the two will be used. Which one is undefined.
Class APMEventAggregates is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10a90) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4818). One of the two will be used. Which one is undefined.
Class APMEventFilter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10ae0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4868). One of the two will be used. Which one is undefined.
Class APMFilterResult is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10b30) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a48b8). One of the two will be used. Which one is undefined.
Class APMPropertyFilter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10b80) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4908). One of the two will be used. Which one is undefined.
Class APMRawEventData is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10bd0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4958). One of the two will be used. Which one is undefined.
Class APMUserAttribute is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10c20) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a49a8). One of the two will be used. Which one is undefined.
Class APMValue is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10c70) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a49f8). One of the two will be used. Which one is undefined.
Class APMSqliteStore is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10cc0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4a48). One of the two will be used. Which one is undefined.
Class APMASIdentifierManager is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10d10) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4a98). One of the two will be used. Which one is undefined.
Class APMInAppPurchaseProductCache is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10d60) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4ae8). One of the two will be used. Which one is undefined.
Class APMInAppPurchaseItem is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10dd8) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4b60). One of the two will be used. Which one is undefined.
Class APMInAppPurchaseTransactionReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10e00) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4b88). One of the two will be used. Which one is undefined.
Class APMProductsRequest is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10e50) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4bd8). One of the two will be used. Which one is undefined.
Class APMLifetimeValueRecorder is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10ea0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4c28). One of the two will be used. Which one is undefined.
Class APMASLLogger is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10ef0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4c78). One of the two will be used. Which one is undefined.
Class APMMonitoringSampledData is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10f40) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4cc8). One of the two will be used. Which one is undefined.
Class APMUserDefaults is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10f90) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4d18). One of the two will be used. Which one is undefined.
Class APMScreen is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e10fe0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4d68). One of the two will be used. Which one is undefined.
Class APMScreenViewReporter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11030) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4db8). One of the two will be used. Which one is undefined.
Class APMAEU is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11080) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4e08). One of the two will be used. Which one is undefined.
Class APMInfoPlistFileUtil is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e110d0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4e58). One of the two will be used. Which one is undefined.
Class APMKeychainWrapper is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11120) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4ea8). One of the two will be used. Which one is undefined.
Class APMNumericUtil is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11198) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4f20). One of the two will be used. Which one is undefined.
Class APMPBAudience is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e111c0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4f48). One of the two will be used. Which one is undefined.
Class APMPBAudienceLeafFilterResult is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11210) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4f98). One of the two will be used. Which one is undefined.
Class APMPBDynamicFilterResultTimestamp is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11260) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a4fe8). One of the two will be used. Which one is undefined.
Class APMPBEvent is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e112b0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5038). One of the two will be used. Which one is undefined.
Class APMPBEventConfig is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11300) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5088). One of the two will be used. Which one is undefined.
Class APMPBEventFilter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11350) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a50d8). One of the two will be used. Which one is undefined.
Class APMPBEventParam is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e113a0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5128). One of the two will be used. Which one is undefined.
Class APMPBFilter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e113f0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5178). One of the two will be used. Which one is undefined.
Class APMPBMeasurementBatch is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11440) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a51c8). One of the two will be used. Which one is undefined.
Class APMPBMeasurementBundle is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11490) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5218). One of the two will be used. Which one is undefined.
Class APMPBMeasurementConfig is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e114e0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5268). One of the two will be used. Which one is undefined.
Class APMPBNumberFilter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11530) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a52b8). One of the two will be used. Which one is undefined.
Class APMPBPropertyFilter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11580) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5308). One of the two will be used. Which one is undefined.
Class APMPBResultData is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e115d0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5358). One of the two will be used. Which one is undefined.
Class APMPBSequenceFilterResultTimestamp is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11620) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a53a8). One of the two will be used. Which one is undefined.
Class APMPBSetting is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11670) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a53f8). One of the two will be used. Which one is undefined.
Class APMPBStringFilter is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e116c0) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5448). One of the two will be used. Which one is undefined.
Class APMPBUserAttribute is implemented in both /Users/${UserName}/Library/Developer/Xcode/DerivedData/${AppName}/Build/Products/Debug-iphonesimulator/Core.framework/Core (0x107e11710) and /Users/${UserName}/Library/Developer/CoreSimulator/Devices/${ランダム英数}/data/Containers/Bundle/Application/${ランダム英数}/${AppName}.app/${AppName} (0x1061a5498). One of the two will be used. Which one is undefined.

原因

CocoaPodsからFirebase SDKを導入した際のTargetを、本来使わない所に記載していたため、どのTargetを参照して良いのか？な状態となっていました。
これの厄介な所は、アプリは普通に動いてしまうので、どこが問題なのかはログから推測になったので、単純なポカミスだったのに気づきにくい所です。

もうちょっと詳しく言うと

私が遭遇した際のケースでもうちょっと深堀りすると、
開発しているアプリのリファクタリングの一貫で、Model部分をEmbedded Framework化して別Targetにしていました。
CocoaPodsのTarget指定したのが、Project本体ではなく、このEmbedded Frameworkの方に指定していたのが問題です。

具体的なPodFileは以下です。

target '{$Embedded Frameworkの名前}' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!

  # Pods for {$Embedded Frameworkの名前}

  # add the Firebase pod for Google Analytics
  pod 'Firebase/Analytics'
  pod 'Firebase/Core'
  pod 'Firebase/Firestore'
  pod 'Firebase/Auth'

  # Optionally, include the Swift extensions if you're using Swift.
  pod 'FirebaseFirestoreSwift'
  # add pods for any other desired Firebase products
  # https://firebase.google.com/docs/ios/setup#available-pods

  target '{$Embedded Frameworkの名前}Tests' do
    # Pods for testing
  end

end

target '{$AppName}' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!

  target '{$AppName}Tests' do
    inherit! :search_paths
    # Pods for testing
  end

  target '{$AppName}UITests' do
    # Pods for testing
  end

end

上記のように

target '{$Embedded Frameworkの名前}'

にFirebaseのSDKを記載してしまったのが問題です。

※Embedded Frameworkについては、以下に詳細を記載していますので、ご興味があれば参照ください。

www.project-unknown.jp

解決方法

原因はTarget指定ミスなので、正式な所に記載してpod installすればOKです。
今回は{$AppName}のTargetに指定するのが正しいので、上述PodFileを以下のように修正します。

target '{$Embedded Frameworkの名前}' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!

  # Pods for {$Embedded Frameworkの名前}

  target '{$Embedded Frameworkの名前}Tests' do
    # Pods for testing
  end

end

target '{$AppName}' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!

  # add the Firebase pod for Google Analytics
  pod 'Firebase/Analytics'
  pod 'Firebase/Core'
  pod 'Firebase/Firestore'
  pod 'Firebase/Auth'

  # Optionally, include the Swift extensions if you're using Swift.
  pod 'FirebaseFirestoreSwift'
  # add pods for any other desired Firebase products
  # https://firebase.google.com/docs/ios/setup#available-pods

  target '{$AppName}Tests' do
    inherit! :search_paths
    # Pods for testing
  end

  target '{$AppName}UITests' do
    # Pods for testing
  end

end

最後にpod installを実行します

$ pod install

これで問題なく動作するはずです。