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', '0155b2a761505b264b7f94fb1425e491', '216.73.216.145', '1760592169', '1760592169', '/index.php/language/en/cat/c29_Kontinente.html')

[XT SQL Error]