Error message such as attachment installation

Ask the teacher
Error message such as attachment installation
Among them: younger0209@gmail.com
Is the old account
The mobile phone has been changed to: yanger0209@gmail.com
Why did you still catch the old account?
How to deal with it?
Thank you

I understand that an app user has a new email account. I do not understand what you mean by, “Why did you still catch the old account?” What do you mean by “catch”?

Also, you mention an error message. Can you provide a screenshot of the error message? Can you describe the circumstances in which the error occurs?