1366 - Incorrect integer value: '' for column `pella-ware`.`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', 'f5c2557ed99b5e1e972483f9bf8966a9', '3.142.124.252', '1714005422', '1714005422', '/address_book.php')

[XT SQL Error]