We have a solution which consists of two projects - a console application project and a web application project. Each of these has an identical in schema, but differently named
This error occurs when you have more than one entity model.edmx files in a single DLL or class library project. Although the reason behind the error is not known to me , you can fix this by deleting the other model or moving the other model.edmx file to another class library .
Also dont forget to remove the references of the previous dll