Trying to clear off old negative balance invoice in payables

I have taken over a set of books and am trying to clear off an old negative invoice in payables. This is from 2 years ago and looking back through journal entries there were about a dozen corrections/reversals. It shows as a zero original balance but a balance owing of 49.00.  When I click on it to pay I get the warning message below and can't do anything else. When I have a negative amount invoice to apply against it I still get the same error. I'm okay with making a manual adjustment in the general journal to deal with any entries made in correcting it - I just can't get it to clear off. Ideas anyone?