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:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentException: An item with the same key has already been added.]
   System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) +60
   System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) +14594072
   Storefront.Web.Framework.HttpModules.SitemapModule.<GetRewritePath>g__GetVariables|9_0(String[] items) +187
   Storefront.Web.Framework.HttpModules.<>c__DisplayClass9_0.<GetRewritePath>b__1() +309
   Storefront.Services.Cache.CacheExtensions.Get(ICacheManager cacheManager, String key, Int32 cacheTime, Func`1 acquire) +137
   Storefront.Web.Framework.HttpModules.SitemapModule.GetRewritePath(String requestUrl, String targetUrl) +247
   Storefront.Web.Framework.HttpModules.SitemapModule.SitemapBeginRequest(Object sender, EventArgs args) +1134
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +223
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +220
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +94


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4667.0