How to correct the PO price on standard PO (without global blanket agreement) that has been received

Hello,

I have a PO on which I need to correct the price. The PO has a line that has already been received and closed for receiving. The received item has also been consumed in the batch and the batch has also completed successfully. While trying to invoice there was huge variance that was noticed( current unit price on po line - 166.48 but in reality it was 4066.48) . This is a standard PO without any blanket agreement that was created from PO requisition. How do I correct the price on the PO without having to undo the batch completion?