I've tried adding two clients as a joint application and an error is appearing. What has gone wrong?

Every client needs to have their own email address as a unique identifier on the system. This ensures that each client's information is properly stored and managed.

If you do not have a second email address, you have the option to add a temporary one that can be changed later. This allows you to proceed with the registration process and update your email address at a later time if needed.