Message SAP BORGR641 - Summarized JIT call &1 and item &2 cannot be deleted

Diagnosis You have tried to delete summarized JIT call &v1&, item &v2& from theinbound delivery item. However, goods receipt has already been postedfor this summarized JIT call. System Response The summarized JIT call cannot be deleted. Procedure In order to delete this summarized JIT call, you first have to reversethe goods receipt posting.