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', 'vi5g4qslt82s59dbcj3r1v3hc6', '54.208.168.232', '1711723535', '1711723535', '/login.php?XTCsid=vi5g4qslt82s59dbcj3r1v3hc6')

[XT SQL Error]