If you receive the error: Save failed with the following error: You cannot remove your own Super Admin permissions when trying to change the password or user name of the SuperAdmin on your Joomla 2.5 system, do the following:

  1. You need to change a setting in the database. Use phpmyadmin which is provided on most Web hosting packages to access the MySQL database for your site.
  2. Locate the _assets table in your database.
  3. The first entry should be id # 1 and have a name of root.1 and a title of Root Asset.
  4. Edit this entry and change the lft column from a 1 to a zero.
  5. Save the change.
  6. You should now be able to modify your suerpadmin id and passwords.