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', '41ea1e6f331da0ca364b6c2b46eb1049', '216.73.217.175', '1780673029', '1780673029', '/')

[XT SQL Error]