CTGKM6202E Cannot disable the authentication method because you are logged in by using the same method. Change your authentication method and then retry this operation.

  Explanation You cannot disable
the authentication method when you are logged in by using the same method. Use another
authentication method and then disable the authentication method. For example, if you are logged in
as a file-based user, you cannot disable file-based authentication method. 

  System action The operation
fails.

  Administrator response
Log in using another authentication method and retry the operation. 