https://userapps.support.sap.com/sap/support/knowledge/en/2578424
2578424 - Document Flow in Delivery not updated when Goods Movement reversed with VL09 transaction...
When Goods Movement is reversed with VL09 it updates MKPF table but does not update VBFA table In Delivery the document flow is not updated with the Material...
https://userapps.support.sap.com/sap/support/knowledge/en/3447752
3447752 - Error VL186 is issued during the delivery cancellation in VL09 | SAP Knowledge Base...
There is no billing document in the delivery document flow, but system prevent the GI cancellation in VL09 with error VL186. Delivery is not relevant for...