Vendor consignment Settlement

Hi

can we change the settled invoice  if yes what is is transaction code or can we park the vendor consignment Invoice.

Goods receipt without  PO

Step 1  MIGO without PO

Step  2. Settlement is done by MRKO

             Can we change receipt  value at the time MrKO.

I tried by changing  the Info record it will not work for receipt

I need the help how to solve  this problem.

Thanks

Sudhir