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', '8c38cc3e36e5a78311ed56be50f22700', '216.73.216.20', '1771725340', '1771725340', '/product_info.php?info=p3414_Laos-Reliefkarte.html')

[XT SQL Error]