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', '3c164f242e8f8c5a47bbf44f4e5c1bb7', '3.14.15.94', '1714144341', '1714144341', '/product_info.php/info/p3359_Finnland-Reliefkarte.html')

[XT SQL Error]