Delete Settlement Reciever on a settlement rule

Hi experts;

     I made a settlement for a Maintenance Order on a Sales Document (Contract) but such contract was wrong.

So, I changed the wrong contract to the correct one on IW32, but the settlement Rule has not been changed and did not read the new correct Sales Documents (contract), and could not delete it.

So I made reverse for the old settlement but even after reverse it can not be deleted.

And now when in try to make new settlement system reads that there are two contract each one takes 100 % of the value on the order so it does not make the settlement (I have added the correct contract on the settlement rule)

So the question is:

How can I Delete or Block the old (wrong) contract in order not to be taken into consideration when I run the settlement on KO88?

Thanks in advance;

Best regards;

Ahmad Mahmud;