1366 - Incorrect integer value: '' for column `wvf_soft_`.`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', 'kp160hqbosgit2q56snq0uvk03', '3.235.60.144', '1627454352', '1627454352', '/shopping_cart.php?XTCsid=kp160hqbosgit2q56snq0uvk03')

[XT SQL Error]