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', '8c7fca115a852e9ab4c509670cce0c80', '216.73.216.44', '1769047854', '1769047854', '/index.php/language/en/cat/c35_Countries.html/page/5')

[XT SQL Error]