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', 'c037041ae64648b47eb759113a6f1c31', '216.73.216.22', '1774457409', '1774457409', '/')

[XT SQL Error]