Duplicate music on my iPhone but not iTunes
This question has been asked many times before, but the remedies don't apply to my iOS version (15.1.1) or iTunes on a PC (12.12.2.2). I don't subscribe to Apple Music.
I have a new iPhone 13 Pro. On my first setup, it copied my iTunes library correctly. Then I made some changes to my library on my PC, and on the next sync it duplicated every song on the iPhone. I can't delete them or update them.
iPhone 13 Pro, iOS 15