This app allows you to scan a playlist and find tracks on unavailable albums.
- Visit this website: pawllo01.github.io/spotify-playlist-checker.
- Click on "Get Token" link and then click agree.
- Paste valid Spotify playlist ID in the text field, e.g.: 6g1y8krgDWLNbOmE738Ahe.
- Click on "Check" button.
- If tracks on unavailable albums are found, they will be listed below.
First, delete the track from your playlist / liked songs and then re-add it.
I also recommend using Spotify Album Availability to visualise where the album is available and to find possible alternatives. Just click on the album cover next to the track name.
It means artist or label deleted this album from Spotify, however in 99% of cases they re-released it again.
Basically, to fix metadata like track names, release date, etc. It's not easy to make changes to an already released album. Artists or labels first need to remove the album and then re-add it with fixed metadata.