Duplicate section error even after using <remove> tag in web.config for IIS

Question

I have a site running in a subdirectory of another site. They run in separate app pools. The two sites are running different versions of Entity Framework. So in the web.config in the subdirectory I have:

<remove name="entityFramework"/>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />

But even with the <remove> tag I still get this error:

Section or group name 'entityFramework' is already defined. Updates to this may only occur at the configuration level where it is defined.

I've also placed <location> tags in the parent web.config wherever possible:

<location path="." inheritInChildApplications="false">

The <location> tag is present around the parent web.config's <entityFramework> section.

And I've placed enableConfigurationOverride="false" in the applicationHost.config files for IIS (both files in System32 and SysWOW64).

How do I prevent the site in the subdirectory from seeing the parent entityFramework tag?

EDIT

IIS Version: 7.5.7600.16385

From the parent web.config:

<configSections>
  <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>

l

  <location path="." inheritInChildApplications="false">
      <entityFramework>
        <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
          <parameters>
            <parameter value="mssqllocaldb" />
          </parameters>
        </defaultConnectionFactory>
        <providers>
          <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
        </providers>
      </entityFramework>
  </location>

From the child web.config:

  <configSections>
    <remove name="entityFramework"/>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />    
    <section name="enterpriseLibrary.ConfigurationSource" type="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceSection, Microsoft.Practices.EnterpriseLibrary.Common, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" />
  </configSections>

l

  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
  </entityFramework>

EDIT 2

In regards to using <clear/>: this causes a series of errors about missing section declarations. If I add back ~100 lines of section declarations I get the error: An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode. The error persists even if I use <validation validateIntegratedModeConfiguration="false" /> in <system.webServer>.

Answer 1

Can you confirm if you tried clear instead of remove the problem still persist or not?

 <configSections>
    <clear/>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />    
    <section name="enterpriseLibrary.ConfigurationSource" type="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceSection, Microsoft.Practices.EnterpriseLibrary.Common, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" />
  </configSections>

You might read more here

Hope this will help you