In the sales order, the order quantity of line item 10 is 10pcs, only 5pcs is shipped. I want to allow the remaining 5pcs to be able to ship at some other time. However, no modification is allowed in the order quantity of this line item 10. Also, no addition of new line item in this sales order.
How to block creation/addition of new line item or block modification in the order quantity of the existing line item, but allow the existing line item to be shipped in a sales order?