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', '7d154fb41195cf90eabe5734218b6f43', '216.73.216.36', '1776100302', '1776100302', '/')

[XT SQL Error]