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', '3312d4dcdf33d2417533c3bca2523392', '216.73.216.3', '1767300762', '1767300762', '/product_info.php?info=p1551_Aethiopien-Satellitenbild.html')

[XT SQL Error]