1366 - Incorrect integer value: '' for column `abtecsho_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', 'ntogpkme1d2nijg35ftdkss7p2', '18.218.185.164', '1746781881', '1746781881', '/shop_content.php/coID/54/product/Funktionsweise-von-Rauchmeldern')

[XT SQL Error]