Entity Framework, скрытая строка подключения ASP.NET Identity?

Я постараюсь прояснить это насколько возможно, но этот вопрос кажется мне загадкой. У меня есть приложение ASP.NET MVC (.NET 4.6.1) с использованием EF и ASP.NET Identity. Это приложение работало нормально еще несколько часов назад. Я вносил небольшие изменения, но теперь, когда я запускаю приложение, я получаю следующую ошибку:

"Keyword not supported: 'mssqllocaldb; attachdbfilename'."

Что интересно, этих ключевых слов нет в моем web.config. Моя строка подключения тоже не изменилась, на самом деле я даже не уверен, как мои изменения могли это сломать.

Использует ли EF или ASP.NET Identity какую-либо конфигурацию из другого места, которого нет в моем проекте?

Любое руководство или помощь будут приняты с благодарностью.

Спасибо!

Ниже мой web.config

    <?xml version = "1.0"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  https://go.microsoft.com/fwlink/?LinkId=301880
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name = "entityFramework" type = "System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission = "false"/>
  </configSections>
  <connectionStrings>
    <add name = "***" connectionString = "Server=***;Initial Catalog=***;Persist Security Info=True;User ID=***;Password=***" providerName = "System.Data.SqlClient"/>
  </connectionStrings>
  <appSettings>
    <add key = "webpages:Version" value = "3.0.0.0"/>
    <add key = "webpages:Enabled" value = "false"/>
    <add key = "ClientValidationEnabled" value = "true"/>
    <add key = "UnobtrusiveJavaScriptEnabled" value = "true"/>
  </appSettings>
  <!--
    For a description of web.config changes see http://go.microsoft.com/fwlink/?LinkId=235367.

    The following attributes can be set on the <httpRuntime> tag.
      <system.Web>
        <httpRuntime targetFramework = "4.5" />
      </system.Web>
  -->
  <system.web>
    <authentication mode = "None"/>
    <compilation debug = "true" targetFramework = "4.6.1"/>
    <httpRuntime targetFramework = "4.5"/>
    <httpModules>
      <add name = "ApplicationInsightsWebTracking" type = "Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"/>
    </httpModules>
  </system.web>
  <system.webServer>
    <modules>
      <remove name = "FormsAuthentication"/>
      <remove name = "TelemetryCorrelationHttpModule"/>
      <add name = "TelemetryCorrelationHttpModule" type = "Microsoft.AspNet.TelemetryCorrelation.TelemetryCorrelationHttpModule, Microsoft.AspNet.TelemetryCorrelation" preCondition = "integratedMode,managedHandler"/>
      <remove name = "ApplicationInsightsWebTracking"/>
      <add name = "ApplicationInsightsWebTracking" type = "Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition = "managedHandler"/>
    </modules>
    <validation validateIntegratedModeConfiguration = "false"/>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns = "urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name = "Microsoft.Owin.Security" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-4.0.0.0" newVersion = "4.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "Microsoft.Owin.Security.OAuth" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-4.0.0.0" newVersion = "4.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "Microsoft.Owin.Security.Cookies" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-4.0.0.0" newVersion = "4.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "Microsoft.Owin" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-4.0.0.0" newVersion = "4.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "Antlr3.Runtime" publicKeyToken = "eb42632606e9261f"/>
        <bindingRedirect oldVersion = "0.0.0.0-3.5.0.2" newVersion = "3.5.0.2"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "System.Diagnostics.DiagnosticSource" publicKeyToken = "cc7b13ffcd2ddd51"/>
        <bindingRedirect oldVersion = "0.0.0.0-4.0.2.1" newVersion = "4.0.2.1"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "System.Web.Optimization" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-1.1.0.0" newVersion = "1.1.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "WebGrease" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-1.6.5135.21930" newVersion = "1.6.5135.21930"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "Newtonsoft.Json" publicKeyToken = "30ad4fe6b2a6aeed"/>
        <bindingRedirect oldVersion = "0.0.0.0-11.0.0.0" newVersion = "11.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "System.Web.Helpers" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-3.0.0.0" newVersion = "3.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "System.Web.Mvc" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-5.2.4.0" newVersion = "5.2.4.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name = "System.Web.WebPages" publicKeyToken = "31bf3856ad364e35"/>
        <bindingRedirect oldVersion = "0.0.0.0-3.0.0.0" newVersion = "3.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <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>
  <system.codedom>
    <compilers>
      <compiler language = "c#;cs;csharp" extension = ".cs" type = "Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel = "4" compilerOptions = "/langversion:default /nowarn:1659;1699;1701"/>
      <compiler language = "vb;vbs;visualbasic;vbscript" extension = ".vb" type = "Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel = "4" compilerOptions = "/langversion:default /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+"/>
    </compilers>
  </system.codedom>
</configuration>