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', 'foiurc0hl7djc7a9pelqv3j7j5', '3.141.29.234', '1746994855', '1746994855', '/product_info.php?info=p644_806415-Schlammsieb-fuer-200-Liter-Futterdaempfer.html')

[XT SQL Error]