How do I change the inventory type of a master item?

I'm about to qualify an item and I noticed the inventory type is "Non-Inventory".  How do I change this to be a physical item?

Answer

As of November 22, 2016, you cannot change the Master Item type once a master item is created. If you want to change the master item type, you have to create a new master item and designate it to the type you wish. We are looking into ways to change master item types while safely protecting the historical data.