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', 'aa99dcf5254010100ce8d782ccce88fc', '216.73.216.198', '1752878695', '1752878695', '/shopping_cart.php/language/en')

[XT SQL Error]