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', 'a47a6bd8e5f23b9749f2fcafd39cf5eb', '216.73.216.115', '1761660776', '1761660776', '/product_info.php/info/p3992_Afrika-Reliefkarte.html')

[XT SQL Error]