Short version: I can't delete a category in my gallery. The one named (The cat's nest).

So I haven't really done much with my galleries since they were limited many years ago. My current issue isn't related to the size or moving items in bulk.

My issue is a change that was made to the naming of categories. The first problem is that I cannot see anything in the category that has a name from before the system changed. I know there are items in there and I can find them if I hunt through a list of all the items in my gallery. Thankfully that list is under a 1000 items. Since the category wasn't working I decided to rename it and move my items. Now I think I have them all moved but I'm not sure and for some reason it won't let me delete the old category whose name no longer fits the rules.

Thank you it worked!