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', '019f854d943ee74b3d5ca2ab07920a1b', '216.73.216.124', '1772652978', '1772652978', '/')

[XT SQL Error]