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', 'ca773c549844f8441fde8e911dc71695', '216.73.216.48', '1763152651', '1763152651', '/shop_content.php/coID/1')

[XT SQL Error]