Enforce Processing of Costs by Transaction Date Question

Summary:

In my current implementation, Client had already implemented Fusion Procurement & Finance in PROD 4 years back.

For all other SCM modules they are still in EBS & will be moving to Fusion in few months.

We have configured Cost management along with other SC modules such as Inventory , Order Management etc. in Fusion for SIT.

We have setup checked for 'Enforce Processing of Costs by Transaction Date' in the Cost profiles in SIT.

We have first month as Apr-25 in SIT where we have opened the Cost Period, there are old Transactions before apr-25 which got created during earlier years (2022,2023,2024) for the Purchase order transactions etc.