Cancel multiple goods receipts associated to service entry sheet

Dear experts,

We have been doing some custom developments over the service entry sheet functionality and we've come across a problem. It seems that one of our developments, by mistake, caused the acceptance of an entry sheet to generate four goods receipts instead of the usual single goods receipt.

We are now looking for a way of getting rid of the duplicated goods receipts but we cannot reverse or cancel them because the system tells us that we should do it from the service entry sheet. Problem is, when we do the reverse from the service entry sheet, it only cancels one of the goods receipts, but not the rest of them.

Could someone help us solving this inconsistency in our system?

Thanks