how to consider extracting and uploading opening balance for PO if customer is changing the BU

Summary:

Client has oracle cloud and now we are moving data from one BU to new BU due to financial reimplementation (new Ledger will be created) we need to transfer all open POs from the old BU to the new BU linked to the new Ledger and COA

Content (please ensure you mask any confidential information):

What's the best practice for data migration in that case:

• extract all open POs and upload it as is on the new BU (upload PO with all total amount and then upload the receipts done on this PO's to simulate the history)
• Upload only the remaining amount that has not been received or invoiced (then PO amount will be different, and the supplier through supplier portal will be confused to see PO with different amount than the agreed)