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', '611a6c29219f98f282bddc0be838a89f', '216.73.216.53', '1752092529', '1752092529', '/index.php/language/de/cat/c34_Kontinente.html')

[XT SQL Error]