Codeigniter duplicate session problem

I have an application built with codeigniter using the sessions class and storing session data in a database.but when I login into the system with different user and different COMPUTER and Browser, I wonder why all users have the same session data as the first login into the system.


SESSION CONFIGURATION

$config['sess_driver'] = 'database';

$config['sess_cookie_name'] = 'ci_session';

$config['sess_expiration'] = 600;

$config['sess_save_path'] = 'ci_sessions';

$config['sess_match_ip'] = FALSE;

$config['sess_time_to_update'] = 30;
$config['sess_regenerate_destroy'] = TRUE;

I attached a database file
please needs help

  codeigniter.png (Size: 31.4 KB / Downloads: 8)