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', '0c92b9c0c1cbbbe634bc4e8b94549a44', '3.20.205.228', '1715211500', '1715211500', '/checkout_shipping.php?XTCsid=6f15378daa624dbfd839586482611826')

[XT SQL Error]