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', '5be1d8e5fe6df089c199ff4cb7b83b1c', '216.73.216.3', '1766237969', '1766237969', '/product_info.php/info/p3109_Schweden-Reliefkarte.html')

[XT SQL Error]