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DotNetNuke: An entry with the same key already exists - Error

If you receive the following error:

Message: DotNetNuke.Services.Exceptions.ModuleLoadException: An entry with the same key already exists. ---> System.ArgumentException: An entry with the same key already exists. at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.SortedList`2.Add(TKey key, TValue value) at DotNetNuke.Entities.Modules.DesktopModuleController.GetPortalDesktopModules(Int32 portalID) at DotNetNuke.UI.ControlPanels.IconBar.BindData() at DotNetNuke.UI.ControlPanels.IconBar.Page_Load(Object sender, EventArgs e) --- End of inner exception stack trace ---

Cause:

This is likely due to duplicate Keys in the DeskTopModules table.  In our case we had a third party Google Analytics Module installed and the newer versions of DNN 5.x include Google Analytics as part of the core.  Apparently during the upgrade process DNN inserts a new record in the DeskTopModules table that uses the same FriendlyName as the existing 3rd party Google Analytics Module already in use therefore creating a conflict.

Resolution:

Open the DesktopModules table and sort by FriendlyName Ascending locate the duplicate key and give one of the duplicates key a unique name.  Restart your website - found under hosting settings - and the problem should disappear.
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5 comments on article "DotNetNuke: An entry with the same key already exists - Error "

Nice. Help to figure out the issues.


Thank you for valuable info.


Thank's for the hint!
Solved my Problem!!


Life saver!!!!


Thanks ever so much it sent me in the right direction.

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