About Form Personalization

Our customer would like to control that the PO line item cannot be duplicated in PO form.

We create a personalization to prevent that the PO line item (In entering mode, not save) cannot be same with saved PO line item. It is success to restrict.

But how about user enter the duplicated PO line item (In entering mode, not save) in a same PO.

For Example

PO Number: Null (In entering mode, not save)

PO Line Num: 1

PO Line Item: ABCD

PO Line Num: 2

PO Line Item: ABCD

If anyone have the experience on this case, let share, thanks!