Sorry for the inconvenience! Unity has changed the format of language resources a few times. The upgrade scripts try to patch the assets automatically, but clearly there is some edge case where it fails and you end up with duplicate language resources. I haven’t been able to repro when this happens. There is also an asset store bug that complicates this issue, since it means some users get the wrong version of Playmaker for the Unity version they’re using. Whenever you change Unity versions, it’s best to manually re-download Playmaker in the Asset Store download manager since the Asset Store does not properly handle Asset/Unity version matching. Unity is aware of this bug, but have no plans to fix it any time soon
