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', '7kusbdfs98kbnteqd3n2m5uni5', '44.201.199.251', '1711701258', '1711701258', '/login.php?XTCsid=7kusbdfs98kbnteqd3n2m5uni5')

[XT SQL Error]