Cannot delete initial categories "Category is being used and cannot be deleted"

Trying to delete initial categories and install custom. I have tried both using new CSV upload and also editor but will not allow me to delete categories. I have went through all the ideas (4) and components and taken out those categories but still get the cannot be deleted.

FOUND IT. I also had to rename in APPS.


Please make sure the category is not being used in the App Inventory.
Documentation here.

Kind regards,