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', 'b4c8c53d13724ef7b73c51cc10d1dfcc', '216.73.216.8', '1758043944', '1758043944', '/index.php/cat/c29_Kontinente.html')

[XT SQL Error]