Can't add a song on a playlist

[stella-frag]

ok, to add songs to my musics there's a limit of 10,000 songs, but then i've started using playlists and now i'm unable to do it. i've already tried to delete some song to see if there was a limit but it still didn't worked out

[Peter__]

Playlists also have a maximum storage limit of 10,000 tracks. Are you going over that number?

[stella-frag]

but i have, like, almost 12k songs on my playlist