Prepayment Invoice Error

To all NAV Expert

I need assistance which I encountered error when I do prepayment invoice. Then, the prepayment invoice amount assigned was P69,440. It was already paid by P62,000. In fact, the correct prepayment invoice amount was P62,000 only.

Now, I received the actual items in order it can be recorded in the Inventory. But, there’s an error message always prompt "Prepayment Line Amount cannot be 69,440 in Purchase Line Document Type=‘Order’,Document No.=‘PO000857’,Line No.=‘10000’.

Hence, I did all the ways just to be solved this problem.

Please advice how to sort out this error.