copy file to your Jellyfin server

install sqlite3

install PowerShell

chmod +x cleanup-media.ps1

run cleanup-media.ps1 -DryRun

it will show you how many episodes and movies will get removed from the database

run cleanup-media.ps1 without -DryRun

The script will ask you to stop Jellyfin

The script will ask you to make a snapshot of your VM/LXC/Container and asks you if it should backup your database

Then it will remove the files from the database

Restart jellyfin