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', '8df77960b9bb03fb45ceb9559fec1cca', '216.73.216.3', '1767602620', '1767602620', '/product_info.php?info=p1664_Bhutan-Satellitenbild.html')

[XT SQL Error]