I'm getting an external data error: "This data isn't available because the Results object's "ID" field has an external column name that can't be found on the external system. Contact your admin for help." does anyone know why I'm getting this error? 

I'm getting an external data error: "This data isn't available because the Results object's "ID" field has an external column name that can't be found on the external system. Contact your admin for help." does anyone know why I'm getting this error?