It's possible to get two versions of GoogleAppMeasurement installed. This is a result of Google-Mobile-Ads-SDK not having a compatible release with Firebase 8. Other Podfile scenarios can lead to a ...
Dependency resolved to an incompatible version: Dependency(fromArtifactVersion=ArtifactVersion(groupId=com.google.firebase, artifactId=firebase-messaging, version=17.5.0), ...