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', 'ef0a6303b9c1134b57dd588e712bc8fe', '216.73.216.3', '1767624156', '1767624156', '/index.php/language/en/cat/c38_Map-Konfigurator.html')

[XT SQL Error]