How To Update Inventory Item Attribute Control from Master to Organization level?

We have an urgent request to update items attributes currently existing in the system from Inventory Expense Item to Expense Items for some selected operating units.These items were initially created as Inventory Expense Item and Inventory Asset Items. The client want their items to be expense items.However, the Inventory Item Attribute control is set at master level,thus upon querying  an item>select organization assignments>Org Attributes>Inventory(Inventory Item,Stockable,Transactable Tabs) are greyed out.

What we intend to achieve is to be update to update the items attribute to suite the organization's requirement as Expense Items.What are necessary steps to achieve the desired result.