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', 'ddecf32a3419f22639b9578c935a68c6', '3.22.249.158', '1714171735', '1714171735', '/index.php?language=en')

[XT SQL Error]