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', '3d871e26ef1f41b8c0f9ed1cc198b37e', '216.73.216.36', '1776192487', '1776192487', '/')

[XT SQL Error]