1366 - Incorrect integer value: '' for column `shop_db3`.`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', 'a88b11a61dfdd04b8c24bdf9784bc7f9', '100.26.135.252', '1711718712', '1711718712', '/shopping_cart.php?XTCsid=a451af72c17a970910eac808a75b0ae1')

[XT SQL Error]