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', '1jsjjpvq6epb8ts6hq04ksiap0', '54.243.2.41', '1711655503', '1711655503', '/login.php?XTCsid=1jsjjpvq6epb8ts6hq04ksiap0')

[XT SQL Error]