[GNC] Uneditable transaction

[Jean Seurin]

   Hi
   I have this odd transaction that I can't fix or delete. I'm met with
   the following error message when trying to delete it:
   This transaction is marked read-only with the comment: 'Generated from
   an invoice. Try unposting the invoice'.
   I've reviewed all invoices but I couldn't find a one with a reference
   to the transaction in question.
   Is there any way to bypass, or solve this read-only status?
   Best