Exc.Inv.No. change in J1IEX

Dear Experts,

We have updated our patch from ABAP 14 to ABAP20. When we was ABAP 14..

if we done the MIGO with part1 with wrong invoice no( by mistake ) than we can change this Exc.no in J1iex ( change ) but after patch updation system in not allowing Exc. Inv. Change but we can change Exc.Group and business Area and duties Etc.

could any body please suggest me what I should do because this type of error and more from store side

RC