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', 'csnqsbnvu1j1l91v5vs7kmgrs3', '52.14.238.102', '1746783611', '1746783611', '/product_info.php?info=p585_Katalog-HBL-Landgeraete.html')

[XT SQL Error]