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', 'da527045f39908ab9c3a12f8bb774c4f', '216.73.216.212', '1770579721', '1770579721', '/')

[XT SQL Error]