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', 'e66accb510bcf9d2db04c16c9aa81bc9', '3.236.145.110', '1711648597', '1711648597', '/product_info.php?info=p298_Bei-uns-in-Bayern.html&XTCsid=a30b88a4b439ebf54b931b21d14e2df9')

[XT SQL Error]