We have a customer order where the line was originally setup with Supply code Purch Order Trans.
The part was received from the supplier and booked in but later returned to them for credit after failing inspection.
The part has been shipped back to the supplier for credit with no replacement order.
However we now cannot unpeg the Customer order Line connected to this or changed the line status to cancel.
How can we cancel this line and allow the overall order to then be completed?

No option to unpeg
