Fatal error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'estero/index.html')' at line 2

Query:
INSERT INTO `visitors_table` (`visitor_ip` ,`visitor_browser` ,`visitor_hour` ,`visitor_minute` ,`visitor_date` ,`visitor_day` ,`visitor_month` ,`visitor_year` ,`visitor_refferer` ,`visitor_page`) VALUES ('54.198.165.74' , 'other' , '04', '01',CURRENT_TIMESTAMP , '26', '09', '17', '' , 'http://www.canticodeicantici.com/groups/show/30/Viaggi-all'estero/index.html') in /web/htdocs/www.canticodeicantici.com/home/inc/classes/class_mysql.php on line 203