How to Delete Character-Specific UI in Edit Mode?

How do I delete them? I can’t rename them. I can only copy them. There’s no delete button when I hover over it. It’s annoying. On the other hand, non-character specific UI can be deleted. The button is there and works. But I’m specifically wanting to delete pre-existing character-specific UI’s in Edit Mode and to continue using the ones I wish to keep. Am I doing something wrong?