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', 'f9944929938cf1f32fe2775b7f2c6778', '216.73.216.125', '1782832853', '1782832853', '/')

[XT SQL Error]