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', 'rk31ivb7sagno27e2f1rhlhgc1', '3.89.116.152', '1711652485', '1711652485', '/login.php?XTCsid=rk31ivb7sagno27e2f1rhlhgc1')

[XT SQL Error]