1366 - Incorrect integer value: '' for column `hbl_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', 'n063jq5di11o3mu9m3m979lqj5', '3.144.132.48', '1746947805', '1746947805', '/product_info.php?info=p147_405700-Pfostentraeger-Schwert-zum-Einbetonieren-Standfu-.html')

[XT SQL Error]