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', '2f952c4fb3225aa74a1550a6ae3d3802', '216.73.216.3', '1767300320', '1767300320', '/shop_content.php?coID=23')

[XT SQL Error]