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', '2d954e31f82f3bd8fd8402a1f1298d66', '216.73.216.198', '1752878662', '1752878662', '/product_info.php/language/de/info/p4019_3D-Relief-Map-Configurator.html')

[XT SQL Error]