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', '4e2eb8e8151f625e554dd006c5943e60', '18.97.14.89', '1773475151', '1773475151', '/')

[XT SQL Error]