Many thanks for getting back and providing the link to documentation. From this I was able to roll back to a database from three weeks back and can now happily report no errors.
For other newbies in my position wondering. That is to say those using Docker containers on unRAID. The basic steps I carried out are as follows. This assumes you are extracting the .zip to another machine such as Windows 10 workstation.
- download a backup .zip from sonarr WebUI.
- Extract and copy onto any other accessible share on unRAID.
- Stop the sonarr container.
- Shell into your unRAID server and navigate to appdata/sonarr.
- Delete the files mentioned in the article markus101 linked above.
- Copy files from the backup placed on share earlier. (again see linked article).
- Restart sonarr container.
- Confirm problem is resolved.
If your not familiar with copying/moving deleting files in Linux. Invoke Midnight Commander from the terminal to get a nifty file manager. Only command you’ll really need is F6 to move each backup file to your /appdata/sonarr directory.
Hope this helps someone else who may have ran in to this and wasn’t too sure how to proceed.
Cheers!