Valuation Structure type from Expense to Asset

Summary:

How to change the Valuation Structure type from Expense to Asset

Content (required):

Mistakenly the inventory asset flag was set "no" on item master, meanwhile, some of the inventory transactions were made, and after running the create cost accounting distribution, these transactions are stored as "Expense". Valuation structure type

Thereafter, the inventory asset flag set "Y", since inventory transactions are stored as an Asset valuation structure, so now we have both structure types(Expense, Asset) for the same item.

I need to know, Is it possible to change the valuation structure from expense to Asset? if not, it will be any problem later on if the same item has two different structure types?