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', '20d48443fa6b034456c5ebbf4d35d180', '216.73.216.191', '1758136042', '1758136042', '/product_info.php/language/en/info/p3155_Germany-Relief-Map.html')

[XT SQL Error]