After PO has been generated, no further amendments could be made to the Purchase order. Therefore, the requestor may choose to Cancelling the whole PO if there are major adjustments required.
When creating a new PO to supersede the old PO, requestor should indicate “Supersede old PO 200000XXXX. ” on the first line item or under Remarks to supplier during standard PR creation. This will make it clear to the supplier and internal SAP users.