1366 - Incorrect integer value: '' for column `shop_db3`.`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', 'c1ab195f3ebe26b36f467253faf4ab4a', '18.189.180.244', '1714111522', '1714111522', '/product_info.php?info=p245_Drunt-am-Bergsee.html&XTCsid=a30b88a4b439ebf54b931b21d14e2df9')

[XT SQL Error]