Cannot evaluate the exception stack trace

Question

hi,

 

System.Data.Entity.ModelConfiguration.ModelValidationException

HResult=0x80131500

Message=One or more validation errors were detected during model generation:

SetupCurriculumTemplateCourse_Course_Source: : Multiplicity is not valid in Role 'SetupCurriculumTemplateCourse_Course_Source' in relationship 'SetupCurriculumTemplateCourse_Course'. Because the Dependent Role properties are not the key properties, the upper bound of the multiplicity of the Dependent Role must be '*'.

Source=<Cannot evaluate the exception source>

StackTrace:

<Cannot evaluate the exception stack trace>

 

it is data annotation error .. please fix