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', 'bbe53c37934e32e2e6b9ef70a2433aaa', '216.73.216.44', '1768588770', '1768588770', '/shopping_cart.php')

[XT SQL Error]