Instead of editing the current bank account details, add a new form of payment and set it as primary by following the steps mentioned below:
- Head onto your Adsense Payments page after you login.
- Click on the option Payment Settings.
- Click on the option "Add a new form of payment".
- Fill in the new bank account details.
- Before you save, select the option that says "Set this form of payment as Primary"
- Hit Save.