Unit price not carrying from purchase requisition line to purchase order line

When I release an approved purchase requistion (convert a purchase requistion into a purchase order), the unit price specified on the purchase requisition line is not carrying over to the purchase order line. This only happens when an ‘item number’ is selected for the line.

Is there a setting to change this so that the unit price on the purchase requisition line always carries over the purchase order line?

Do you solved this question? I have the same problem…