I added.
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$_DB_table_prefix_user = 'gl_'; // User prefix
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$_TABLES['access'] = $_DB_table_prefix_user . 'access'; // user prefix
$_TABLES['article_images'] = $_DB_table_prefix . 'article_images';
$_TABLES['blocks'] = $_DB_table_prefix . 'blocks';
$_TABLES['commentcodes'] = $_DB_table_prefix . 'commentcodes';
$_TABLES['commentmodes'] = $_DB_table_prefix . 'commentmodes';
$_TABLES['comments'] = $_DB_table_prefix . 'comments';
$_TABLES['cookiecodes'] = $_DB_table_prefix . 'cookiecodes';
$_TABLES['dateformats'] = $_DB_table_prefix . 'dateformats';
$_TABLES['events'] = $_DB_table_prefix . 'events';
$_TABLES['eventsubmission'] = $_DB_table_prefix . 'eventsubmission';
$_TABLES['featurecodes'] = $_DB_table_prefix . 'featurecodes';
$_TABLES['features'] = $_DB_table_prefix_user . 'features'; // user prefix
$_TABLES['frontpagecodes'] = $_DB_table_prefix . 'frontpagecodes';
$_TABLES['group_assignments'] = $_DB_table_prefix_user . 'group_assignments'; // user prefix
$_TABLES['groups'] = $_DB_table_prefix_user . 'groups'; // user prefix
$_TABLES['links'] = $_DB_table_prefix . 'links';
$_TABLES['linksubmission'] = $_DB_table_prefix . 'linksubmission';
$_TABLES['maillist'] = $_DB_table_prefix . 'maillist';
$_TABLES['personal_events'] = $_DB_table_prefix . 'personal_events';
$_TABLES['plugins'] = $_DB_table_prefix . 'plugins';
$_TABLES['pollanswers'] = $_DB_table_prefix . 'pollanswers';
$_TABLES['pollquestions'] = $_DB_table_prefix . 'pollquestions';
$_TABLES['pollvoters'] = $_DB_table_prefix . 'pollvoters';
$_TABLES['postmodes'] = $_DB_table_prefix . 'postmodes';
$_TABLES['sessions'] = $_DB_table_prefix . 'sessions';
$_TABLES['sortcodes'] = $_DB_table_prefix . 'sortcodes';
$_TABLES['speedlimit'] = $_DB_table_prefix . 'speedlimit';
$_TABLES['statuscodes'] = $_DB_table_prefix . 'statuscodes';
$_TABLES['stories'] = $_DB_table_prefix . 'stories';
$_TABLES['storysubmission'] = $_DB_table_prefix . 'storysubmission';
$_TABLES['syndication'] = $_DB_table_prefix . 'syndication';
$_TABLES['topics'] = $_DB_table_prefix . 'topics';
$_TABLES['tzcodes'] = $_DB_table_prefix . 'tzcodes';
$_TABLES['usercomment'] = $_DB_table_prefix_user . 'usercomment'; // user prefix
$_TABLES['userindex'] = $_DB_table_prefix_user . 'userindex'; // user prefix
$_TABLES['userinfo'] = $_DB_table_prefix_user . 'userinfo'; // user prefix
$_TABLES['userprefs'] = $_DB_table_prefix_user . 'userprefs'; // user prefix
$_TABLES['users'] = $_DB_table_prefix_user . 'users'; // user prefix
$_TABLES['vars'] = $_DB_table_prefix . 'vars';