3616312 - Field Purchasing Document Number is not filled in Create Purchase Order - Advanced

Whenever a purchase order is created with reference to an old purchase order, the reference document field (Purchasing Document Number) is not filled or displayed with old PO number.

When creating a PO with reference to a PR, contract, or RFQ, the document numbers are included and displayed in the new PO. This is because the fields BANFN, KONNR, and ANFNR for PRs, contracts, and RFQs are actual fields within table EKPO. This means these values are actually stored in the purchase order, whereas the field for Purchasing Document Number (REFBS) is not. Therefore, when referencing a purchase order to create another purchase order, the "old" purchase order number is not stored in the same way as references for purchase requisitions, contracts, or RFQs. The reference field for purchase orders is simply placed next to other fields for convenience.