I restarted my server and got this message 19 times. What doe this mean, Is it related to key and certificate?

 

Type : System.ArgumentException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Message : Item has already been added. Key in dictionary: 'host'  Key being added: 'host'
Source : mscorlib
Help link :
ParamName :
Data : System.Collections.ListDictionaryInternal
TargetSite : Void Add(System.Object, System.Object)
Stack Trace :    at System.Collections.ListDictionaryInternal.Add(Object key, Object value)
   at DotShoppingCart.Commercial.OrderPipeline.TaskProvider.Proccess(String host, IConfigurationSource cfgSrc)
   at DotShoppingCart.Commercial.OrderPipeline.ProcessorProvider.Run()
   at DotShoppingCart.Commercial.OrderPipeline.RunnableProvider.StartRun()