1366 - Incorrect integer value: '' for column `hbl_shop`.`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', 'rohaq1ith7llppb4962esj8bm7', '216.73.216.242', '1749521753', '1749521753', '/index.php')

[XT SQL Error]