SOLVED: Media scanning failing, and unable to use migration fix

[TheDreadPirate]

You don't have to reinstall, but you will need to clear out /var/lib/jellyfin.

Code:

sudo systemctl stop jellyfin
sudo mv /var/lib/jellyfin /var/lib/origJellyfin
sudo mkdir /var/lib/jellyfin
sudo chown jellyfin: /var/lib/jellyfin
sudo systemctl start jellyfin

If the posters are saved in your media directory, you can reuse them. If not, you'll have to start over.

You have a couple options to help preserve any customized metadata.

1) Enable NFO saver and/or enable saving of images to the media directory in the library settings.
2) Create a cronjob to backup Jellyfin's data directory.