>> Solved: I removed the docker from Previous apps and it did the trick.
Thank you VERY much for posting this. I did the normal first time user mistake of installing a different docker and using the same path so of course this deleted my whole Sonarr setup and configuration ( user error ). After a full reinstall / reconfigure Sonarr, this "cleanup" app still wanted to delete it again.
Didnt feel like doing that again so stumbled across your post and worked like a charm.