SAP Message VL448 - There is an open inbound delivery &3 in the WMS for PO &1, item &2

Diagnosis There is an inbound delivery &V3& for the PO item &V1& &V2&, that iscurrently being processed in the decentralized Warehouse ManagementSystem. You can no longer cancel the PO item. System Response The system rejects the requested status change. Procedure This business transaction must be reversed at organizational level.