Entity Framework 4.3.1 and Migrations problem (error: The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception.)

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C#

Visual-Studio

MVC

MVC3

, +

After I installed latest EntityFramework 4.3.1 to my MVC3 project, I decided to start using new Migrations feature.

But then, my project won't build and give this error:

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.

There is a duplicate 'entityFramework' section defined

Config Source:

<configSections>
  <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.3.1.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
</configSections>

So it builds and works fine when I disable this section in web.config:

<configSections>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.3.1.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
  </configSections>

But when I disable it, and then I ran Enable-Migrations and then Add-Migration [Some_Name] to create an initial named migration, I get this error:

The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception.

So my question is - is there a way to use Migrations without disabling/enabling configSection in web.config, or what I am missing?