By code we me the field code on account.account
From loans module in accounts.accounts which is also chart if accounts. several accounts are created when a loan is posted. The issue seems to exist in the loans when the name is the same and there's issues
Two different loans had not the same but the same numbers. One rc one lc. The number was being referenced in creating the loan accounts. That was the issue. So just change one of the loan numbers and the issue won't come up anymore