How to get rid of strange numbered genres?
The "Get Info" window in iTunes includes a list of genres that are strings of numbers and not associated with any songs in my library. They do not appear in the column browser and I cannot make a playlist using them. All songs in my library have other genres, there are no songs without genres and certainly none with numbers like these. There are six of these numbered genres on the list. How do I get rid of them?
I am using iTunes 12.3.3.17 on Yosemite. I don't know when this started happening; I just noticed it a few days ago.