1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '25f40a540808c952a94b77f160bb0deb', '216.73.216.8', '1757922012', '1757922012', '/shop_content.php/coID/8/content/Sitemap')

[XT SQL Error]