session keeps expiring

[eluser]keevitaja[/eluser]
not sure, if i'm supposed to that, but it saved my day

Code:

class MY_Session extends CI_Session {
  function sess_update() {
    
    $session['old'] = $this->userdata['session_id'];
    
    parent::sess_update();
    
    $session['new'] = $this->userdata['session_id'];
    
    $this->CI->db
      ->where(array('session_id' => $session['old']))
      ->update('logged_users', array('session_id' => $session['new']));
  }
}