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', 'add2ecb1edfd421a6b27e2c8d7b5ef38', '216.73.217.31', '1788486946', '1788486946', '/')

[XT SQL Error]