If you change your name you will lose all of your certificates. Do you want to continue?
What happened
You attempted to change the user name stored in your User ID. If you do this, you will need to have your User ID re-certified before you can access servers again.
What you can do
Change the user name on a safe copy, send the safe copy to your certifier, and continue to use your existing User ID until you get the safe copy back. Then merge the safe copy with your existing User ID.