Changing the item type from inventory item to non inventory item

Hello Community , 

I made an point and performed acquisition bid and by mistake performed GRPO for that aforesaid point arsenic good , this point should person been marked arsenic non inventory item, I cancelled the GRPO papers and made the inventory 0 again but cannot marque the point arsenic non inventory item, SAP is not allowing me.

Is determination immoderate mode to to marque the aforesaid point arsenic non inventory item?