Exception при добавлении

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Visual Studio Just-In-Time Debugger
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An unhandled exception ('Unhandled Error in Silverlight Application 
Code: 4004    
Category: ManagedRuntimeError       
Message: 
System.ServiceModel.DomainServices.Client.DomainOperationException: Submit 
operation failed. An entity with the same identity already exists in this 
EntitySet. ---> System.InvalidOperationException: An entity with the same 
identity already exists in this EntitySet.

   в System.ServiceModel.DomainServices.Client.EntitySet.AddToCache(Entity 
entity)

   в System.ServiceModel.DomainServices.Client.Entity.AcceptChanges()

   в 
System.ServiceModel.DomainServices.Client.Entity.System.ComponentModel.ICha
ngeTracking.AcceptChanges()

   в 
System.ServiceModel.DomainServices.Client.DomainContext.ProcessSubmitResult
s(EntityChangeSet changeSet, IEnumerable`1 changeSetResults)

   в 
System.ServiceModel.DomainServices.Client.DomainContext.CompleteSubmitChang
es(IAsyncResult asyncResult)

   --- Конец трассировки стека внутреннего исключения ---

   в 
System.ServiceModel.DomainServices.Client.OperationBase.Complete(Exception 
error)

   в 
System.ServiceModel.DomainServices.Client.SubmitOperation.Complete(Exceptio
n error)

   в 
System.ServiceModel.DomainServices.Client.DomainContext.CompleteSubmitChang
es(IAsyncResult asyncResult)

   в 
System.ServiceModel.DomainServices.Client.DomainContext.<>c__DisplayClassd.
<SubmitChanges>b__5(Object )     
') occurred in iexplore.exe [2900]. Just-In-Time debugging this exception 
failed with the following error: Неопознанная ошибка

Check the documentation index for 'Just-in-time debugging, errors' for more 
information.
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ОК   
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Original issue reported on code.google.com by seva.ask@gmail.com on 28 Apr 2010 at 8:15
seva-ask / qreal

Exception при добавлении #26
