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', '60aae172702e92ba0066b63e96d067af', '216.73.216.9', '1759492874', '1759492874', '/product_info.php?info=p1544_Kolumbien-Satellitenbild.html')

[XT SQL Error]