SAP Message /ISDFPS/MM832 - PReq &1 item &2 is still contained in the maintenance relationships table

Diagnosis
Table /ISDFPS/ORTOB1 (Technical Object Relationships (PM) - AdditionalData) still refers to the purchase requisition (PReq).

System Response
The PReq cannot be archived.

Procedure
First reorganize the relationship data or technical objects.