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', 'ee35be1125c7a65ddec65e7ccfa51f8c', '216.73.217.177', '1778872233', '1778872233', '/')

[XT SQL Error]