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', 'f9f9ccd301ebef0b9ce7c2acb7e4e1cc', '216.73.216.115', '1761688242', '1761688242', '/product_info.php/language/de/info/p4017_Reliefkarten-Poster.html')

[XT SQL Error]