Q: Several Songs Seem To Be Corrupted?

Several songs have for some reason kind of reason become corrupted.

I first noticed a problem with music being played on my iPhone, where music that was on my iTunes was not showing up on my phone. Then 2 days ago, all of the songs that had disappeared on my phone have sort of become corrupted? I can't download, restore, play any of these songs, but can guess what most of these are as the album art is still saved for each song.

When I try to download a song I get the error 5002. I have Apple Music.

Is there any way I can fix this? Rather than having to delete them all and re-add them.

Also a way to prevent this if anyone knows.

iPhone 5C, iOS 9.3.5, iTunes 12.4.3