1366 - Incorrect integer value: '' for column `creatihu_shop`.`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', 'f74c086fb5f40ffddfcbf1a036af7ee1', '44.210.240.31', '1711721057', '1711721057', '/index.php?cat=c73_.html')

[XT SQL Error]