Enter a negative line amount in a Prepayment

Hello,

I have some historic prepayments in AP that have been validated, paid, and applied to invoices. However we have identified that some distributions need to be re-coded to different account combinations.

So we need to either reverse the distributions and enter them against the correct account combinations, or discard the lines and re-enter them against the correct account combinations.

The system permits either option when the invoice line amount is a positive figure. However we are unable to enter a negative amount in a prepayment invoice line.

These are historic prepayments so at some point Oracle allowed us to enter negative values in prepayment invoice lines, but in 12.1.3, it seems this is prevented.