Проблема с cron

Warning: Invalid argument supplied for foreach() in /home/user/site.com/www/components/users/model.php on line 812

        $users_list = $this->inDB->get_table('cms_users', "DATE_SUB(NOW(), INTERVAL $month MONTH) > logdate", 'id');
        foreach($users_list as $usr){
            $this->deleteUser($usr['id'], true);
        }
 

        $users_list = $this->inDB->get_table('cms_users', "DATE_SUB(NOW(), INTERVAL $month MONTH) > logdate", 'id');
if ($users_list){
        foreach($users_list as $usr){
            $this->deleteUser($usr['id'], true);
        }
}