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', '83481132d78f273bd74b311edcf298d0', '216.73.217.85', '1790033629', '1790033629', '/')

[XT SQL Error]