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', 'b7da8ace62a1a7d11093e9a9334b519c', '216.73.216.44', '1768803676', '1768803676', '/shop_content.php/coID/2')

[XT SQL Error]