SAP Message 8B658 - Enter the internal document number of the original document

Diagnosis
You have created an item with an itemtype that indicates that thisdocument refers to a previously posted document within the system. Itis not possible to report this document in the legally correct way ifno reference is entered.

System Response
The document will not be posted.

Procedure
Either change the itemtype or enter the reference (internal documentnumber) in the corresponding field.