Deleted/Hidden albums and songs keep coming back
This started happening today on iTunes installed on my MacBook Pro. All songs and albums that I've deleted and hidden months and years ago suddenly reappeared with little cloud symbol next to them. No matter how many times I delete and hide them again, they keep coming back with the cloud symbol. How do I make this go away? It's extremely irritating.
MacOS High Sierra 10.13.3
iTunes 12.7.3.46
Thanks!
MacBook Pro, Mac OS X (10.7.5)