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', '27a3b3249c3fe0bbc797b8036d9e5114', '18.97.14.88', '1783662754', '1783662754', '/')

[XT SQL Error]