Hi @CU13032032-0 ,
Could you please confirm if the duplicate lines mean the same item, price, and quantity are entered as separate lines within the same Trade Agreement?
If yes, there is no standard validation to prevent this, so the system will not stop posting. I suggest using the Group Lines filter to identify duplicate items and see how many times each has been added, allowing the user to review them before posting.
Regards,
Syed Haris Shah