1366 - Incorrect integer value: '' for column `magickland`.`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', 'elmii95ut8kstuj88n7marhf01', '18.191.140.27', '1718731883', '1718731883', '/index.php/cat/templates/xtc5/img/admin/images/icons/templates')

[XT SQL Error]