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', '38ekk8ccajmrfek2ess6er5uh5', '44.222.242.27', '1711704786', '1711704786', '/login.php?XTCsid=38ekk8ccajmrfek2ess6er5uh5')

[XT SQL Error]