1366 - Incorrect integer value: '' for column `hbl_shop`.`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', '062drqiv2g8oj0rjp85lv7k115', '216.73.216.89', '1766660647', '1766660647', '/shop_content.php?coID=2')

[XT SQL Error]