1366 - Incorrect integer value: '' for column `DBchUcr8hevu`.`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', 'b9o6b2cacc12054ct8r3k2a2m5', '216.73.216.216', '1767890241', '1767890241', '/shop/product_info.php/language/de/info/p51_Kegelgriff-fuer-Haehne-G1-8---Edelstahl.html/XTCsid/2b1feccca20fdb2907d381447b947a99')

[XT SQL Error]