getting error in datamodel in mvc4

Question

I am getting this error, how to resolve this

Schema specified is not valid. Errors: 
The relationship 'Edu2Model.FK_TestQuestion_Test' was not loaded because the type 'Edu2Model.TestQuestion' is not available.
The following information may be useful in resolving the previous error:
The required property 'TestQuestionShort' does not exist on the type 'MavinLMSDAL.DataModels.TestQuestion'.