Wire v6 sourceReleaseJar task broken

[AlexanderEggers]

After updating wire from v5.5.1 to v6.2.0, I'm getting the following error:

Execution failed for task ':proto-android:sourceReleaseJar'.

Cannot copy file '/Users/alexandereggers/Developer/grpc-android/lib/build/generated/source/wire/release/myapp/proto/common/Blob.kt' to 'myapp/proto/common/Blob.kt' because file '/Users/alexandereggers/Developer/grpc-android/lib/build/generated/source/wire/release/myapp/proto/common/Blob.kt' has already been copied there.