I have created the sales order with normal and 3 party materials, with reference to this order i have created the purchase order and delivered normal materials. after some period i am trying to put the reason for rejection code for 3 rd party materials. but the system is showing the error like " subsequent documents already exist for item xyz". then i deleted the purchase requestion and purchase eventhough system is showing the same message while i am trying to put the rejection in the Sales order.
Could you plz let me know the reason why the system is not accepting to put the reason for rejection in the sales order after deleting the PR and PO????