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', 'ae3957aba131ea29ddefc09af2148fc0', '216.73.216.8', '1758025136', '1758025136', '/index.php/language/de/cat/c32_World.html')

[XT SQL Error]