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', '1251371e7c8750a09d8fc6d7134df2e2', '216.73.216.77', '1782580777', '1782580777', '/')

[XT SQL Error]