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', '8fe8bdc7d387ed73ba03a13c03b3b658', '18.97.14.80', '1775855583', '1775855583', '/')

[XT SQL Error]