We happened to know A customer code been posted with wrong gl recon account in FBL5N.
User has been choosing mistakenly wrong alternative recon. account while manual posting.
So User wants to change this GL account on the line of customer in FBL5N like from 11**100 to 11***200 especially only for open items.
What solution should we have?
Note: Recon account on customer master has been correct since Go-Live, actually.