Updating Bank Branches for a Bank Account.

We have a Bank 'B' with two bank branches 'BR1', and 'BR2'. We have created a Bank Account and used Bank 'B' and its Branch BR1. However, we now want the Bank Branch to be 'BR2' instead of 'BR1', so I navigated to Bank Accounts Maintenance and clicked on 'Update Account' information. This does not give the option of changing the Bank or Bank Branch for this account. How can Bank Branch for a Bank Account be changed without Deleting this account or Creating a new one.

Thanks in advance for the help...