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', '1e7c18c612fcb4a1fa32a90d2e7278cf', '216.73.216.142', '1758248115', '1758248115', '/product_info.php/info/p1640_Estonia-Satellite-Image.html')

[XT SQL Error]