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', '3d0675dfae0e9904f9c92d2ee9534858', '18.97.14.82', '1788577532', '1788577532', '/')

[XT SQL Error]