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', 'okkgks6ras0bkilv225ag96cj7', '44.192.51.19', '1711613511', '1711613511', '/login.php?XTCsid=okkgks6ras0bkilv225ag96cj7')

[XT SQL Error]