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', '29b52f510ef3f4275cbc074bce0d93ac', '216.73.216.99', '1778055854', '1778055854', '/')

[XT SQL Error]