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', '4cmvnril891smsrr95vgg5d4v6', '54.89.70.161', '1711633851', '1711633851', '/login.php?XTCsid=4cmvnril891smsrr95vgg5d4v6')

[XT SQL Error]