I have set my DB to perpetual inventory and the client decides to change it to non perpetual, I already have item master in my DB. As I searched, I need to remove the item master data before changing it to non perpetual. I remove my items using the clean up wizard. I also unchecked the calculate gross profit in the document settings > general tab. After doing all those, I still get the error "Item cost cannot be base price origin for gross profit calculation. [Administration - Perpetual Inventory Management]"
How do I change my current DB to a non perpetual inventory without creating a new DB?