Radarr
https://radarr.videoThere are two common problems with Docker volumes: Paths that differ between the Radarr and download client container and paths that prevent fast moves and hard links. The first is a problem because the download client will report a download's path as /torrents/My.Movie.2018/ , but in the Radarr container that might be at /downloads/My.Movie.2018/ .
Releases · Radarr/Radarr · GitHub
https://github.com/Radarr/Radarr/releases03.06.2021 · 3.1.1.4954. To receive further updates for a non-docker installation, please change the branch to master. (Settings -> General (Show Advanced Settings) -> Updates -> Branch) If you are using docker you will need to update the container image. Do not attempt to update Radarr within an existing docker container.