1366 - Incorrect integer value: '' for column `pella-ware`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'o48avln24attjjneoprvjqt9p7', '54.205.238.173', '1711614238', '1711614238', '/login.php?XTCsid=o48avln24attjjneoprvjqt9p7')

[XT SQL Error]