Diagnosis
Item &V1&, account assignment number &V2& in the purchase order you arecurrently processing references a different funds reservation from theone in purchase requisition &V3&m item &V4&, which the purchase orderalso references. As a purchase order can reference either a fundsreservation or a purchase requisition, it must, if referenced to apurchase requisition, take over the funds reservation referencespecified in the purchase requisition.
If you want to refer to another funds reservation, change the documentin the purchase requisition.