Upgraded to the latest and was trying to pull a subcategory out of parent to become a new parent. This is not possible in the latest version. In previous versions which was from 20240219 (I don’t remember the exact version) there was a way to select No Category.
Now in the Parent Category it only shows other Parents but the No Category is no longer an option to select.
hmmm I don’t remember ever doing this but I can reproduce that there is no “No category” option nor is there a way to “unselect” a parent category without selecting another existing one.