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', '603c7825b5ee2b6d2a50dbadf6b9d7f7', '216.73.216.53', '1752093140', '1752093140', '/product_info.php/language/de/info/p3109_Sweden-Relief-Map.html')

[XT SQL Error]