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', 'avb4ra8eakn66f6eusl42en714', '3.14.142.115', '1713460047', '1713460047', '/login.php?XTCsid=avb4ra8eakn66f6eusl42en714')

[XT SQL Error]