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', '49bbab77a123415d4636dc3eb41821fe', '216.73.216.110', '1768323075', '1768323075', '/shop_content.php/coID/8/content/Sitemap')

[XT SQL Error]