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', '74bjd4jglbjcgvgtr7moftvi20', '3.143.9.115', '1713565609', '1713565609', '/login.php?XTCsid=74bjd4jglbjcgvgtr7moftvi20')

[XT SQL Error]