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', 'f2d88866600da99221a02083a9e1b479', '216.73.217.30', '1777972495', '1777972495', '/')

[XT SQL Error]