Issue -- Not able to modify GL accounts for receipt method Remittance Bank Accounts

Analysis:

GL accounts are not editable on Remittance Bank Account for the Receipts Method. It is standard functionality that once a Receipt Method Remittance Bank Account is used in creation of Receipts in the system, the accounting information cannot be modified in the setup.  

Also, the association of Receipt Method, Business Unit and the Bank/Branch/Account needs to be unique. 

If a bank account is already defined and even if the user end dates it and untick the primary flag, still same relationship with exactly all the same attributes (Receipt Method, BU, Bank/Branch/Account) cannot be created and an error get raised "This remittance bank account has already been defined for this receipt method and business unit. (AR-856812)"

However, same account can be defined under new receipt method, Workaround is to create new receipt method and end date the existing.