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Entity Framework - Mapping issue

I had the following entities in my domain:

And this is how it was mapped through Entity Framework:

Unfortunately Entity Framework got confused when I tried to create a new Role and RoleAssignment. It generated the wrong query for the RoleAssignment and tried to set the “Id” field to the Role id.

To fix it I had to explicitly tell Entity Framework to use the Role_Id column to map the foreign key relationship:

Strange thing is that this code was working in a previous release of the application.

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