https://userapps.support.sap.com/sap/support/knowledge/en/3426995
3426995 - BAPI_REQUISITION_DELETE allows delete a Purchase Requisition | SAP Knowledge Base Article
BAPI_REQUISITION_DELETE allows to flag for deletion a Preq even it has a PO creted with reference. With standard ME52N is not possible due to the error 06 152....
a purchasesap knowledgebapirequisitiondelete