SAP Message M8321 - Document contains same order item more than once

Diagnosis
Under the following circumstances, you can settle an order item in aninvoice received via EDI more than once:

  • Goods-receipt-based Invoice Verification has been defined for the order
  • item.
    • The IDoc contains the delivery note numbers of the goods receipts.
    • System Response
      If this is not the case, the system cancels posting of the IDoc.

      Procedure
      Check the IDoc. You may be able to edit the IDoc (for example, if thevendor transmitted the wrong order item by mistake). Otherwise, youmust inform the vendor and ask for the invoice with the corrected datato be transmitted once again.