Hi Girish,
Account assignment category "S" is Z developmet for the change is in order to book the financial liability at time of making the GRN.
Old PO's are big in number. In most of the cases partial GRN has been done. For old PO's against there is no subsequent doc no I can delete the line item and create new with right combination but for partial GRN system does not allow to change quantity and to create a new line for part without reversing follow on documents
Can we restrict at creation level to not use A and D combination?