How can we update the valuation structure to apply to both new and existing items.

Summary:

Our current cost profile (valuation structure includes cost organization, inventory organization, and sub-inventory).

We aim to transition to a new cost profile (valuation structure) based on locators (cost organization, inventory organization, sub-inventory, locators), for existing cost organization, cost book, and inventory organization.

How can we effectively change the valuation structure to apply to both new and existing items. All new transaction for already costed items to take new valuation structure and the existing cost.