I'll give it a try. Thank you.
I'll give it a try. Thank you.
Create a new temporary holding subcat in "Sheet Music". Move all of the products in "Sheet Music Books" to this holding subcat, create your new sub-subcats, and move the products into those sub-subcats.
Note: even though it is possible to move products into a category that has subcats, don't do it. It will create the possibility for search and pricing errors.