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', 'f2b05d43d4bef5fe5b6cd4f752cf2629', '216.73.216.70', '1779069882', '1779069882', '/')

[XT SQL Error]