Recently, we\'ve upgraded our organization\'s Crashlytics account to Fabric, and I\'m trying to replace the old Crashlytics SDK with the new Fabric SDK in our existing apps.
I found exactly what @TreKing mentioned in his comment. The upgrade/migration failed to remove the previous dependency from my app/build.gradle file. Look for an old entry like compile 'com.crashlytics.android:crashlytics:1.1.13' and remove it.