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', 'c93ed731a6f98d3b6008924475df7229', '216.73.216.65', '1752608663', '1752608663', '/index.php/cat/c7_3D-Print.html')

[XT SQL Error]