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', '362653e6af7ea9893f6f518a07ca591f', '18.97.14.85', '1781728691', '1781728691', '/')

[XT SQL Error]