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', 'fb813840eb511bcf5d9344a9cf6a68e9', '216.73.216.198', '1752878746', '1752878746', '/product_info.php/language/de/info/p439_Reliefmap-Configurator.html')

[XT SQL Error]