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', 'f2cc52b57d76e88d3502ab6ebd53ee2b', '18.118.200.197', '1714065327', '1714065327', '/shop_content.php?language=de&coID=7')

[XT SQL Error]