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', 'c9f988c45015aa32e0ad50ab1a5fe399', '3.144.189.177', '1713919367', '1713919367', '/product_info.php?info=p323_Jericho---Mundstangen-Set.html&XTCsid=42f56783889520011baaa0c109b43aca')

[XT SQL Error]