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', '460396d7e7ba334ff5a7fcbeaa5318a7', '216.73.216.191', '1758192760', '1758192760', '/product_info.php/info/p4019_3D-Reliefkarten-Konfigurator.html?refID=2')

[XT SQL Error]