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', '180280a0e9ad2ac2528faef4373bb27d', '216.73.216.162', '1773987894', '1773987894', '/popup_content.php/coID/1')

[XT SQL Error]