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', '3030c1505429edba685a3904b7173db5', '216.73.216.142', '1758266383', '1758266383', '/index.php/language/en/refID/2')

[XT SQL Error]