Can't delete song from songs menu/library

[Serial_Velocity]

When i select songs on the left side there are 3 songs that are greyed out and that i can't remove.

The 3 songs are from a album called New Music. These songs are the first 3 i added in 2014. I think the album is an old playlist.

When shuffle play is activated, it stops playing. And if it happens a few times an hour, it gets annoying.

Uninstalling and reinstalling has no effect. Last month a Samsung 960 EVO with new OS installed. Same result.

I hope someone can help me to solve this little problem.

Thank you in advance and greetings,

Michel