An item with the same key has already been added.

Server Error in '/' Application.

An item with the same key has already been added.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: An item with the same key has already been added.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

  <%@ Page Language="C#" Debug="true" %>


2) Add the following section to the configuration file of your application:

       <compilation debug="true"/>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace:

[ArgumentException: An item with the same key has already been added.]
   System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) +14501515
   CMSWebParts_DPA_Products_DPA_Products.SetConfiguration() +884
   CMSWebParts_DPA_Products_DPA_Products.SetContent() +81
   CMS.PortalControls.CMSWebPartZone.OnContentLoaded() +128
   CMS.PortalControls.CMSAbstractLayout.OnContentLoaded() +150
   CMS.PortalControls.CMSAbstractLayout.LoadWebPartsContent(Boolean reloadData) +296
   CMS.PortalControls.CMSAbstractLayout.LoadContent(PageInfo pageInfo, Boolean reloadData, Boolean allowOrphanedZones) +1066
   CMS.PortalControls.CMSPagePlaceholder.LoadContent(PageInfo pageInfo, Boolean reloadData) +1999
   CMS.PortalControls.CMSPagePlaceholder.LoadContent(PageInfo pageInfo, Boolean reloadData) +2214
   CMS.PortalControls.CMSPortalManager.LoadPage(Boolean reloadData) +372
   CMS.PortalControls.CMSPortalManager.PageHelper_InitComplete(Object sender, EventArgs e) +26
   CMS.Helpers.PageContext.CurrentPage_InitComplete(Object sender, EventArgs e) +330
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2324

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.36366