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', '15a9r2gir34h5ukicsfimfslk4', '3.14.142.115', '1713448530', '1713448530', '/login.php?XTCsid=15a9r2gir34h5ukicsfimfslk4')

[XT SQL Error]