Commented Issue: The given key was not present in the dictionary. [2434]

Cause: Too many packages on our custom feed?
Resolution: Archive older packages.

We had ~400 versions for about 10 different packages.

Whenever the Packages folder gets large we get this error:

<error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
<code/>
<message xml:lang="en-US">An error occurred while processing this request.</message>
<innererror>
<message>The given key was not present in the dictionary.</message>
<type>System.Collections.Generic.KeyNotFoundException</type>
<stacktrace>
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at NuGet.Server.Infrastructure.ServerPackageRepository.GetMetadataPackage(IPackage package)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.OrderedEnumerable`1.<GetEnumerator>d__0.MoveNext()
at System.Linq.Enumerable.<TakeIterator>d__3a`1.MoveNext()
at System.Data.Services.DataService`1.SerializeResponseBody(RequestDescription description, IDataService dataService)
at System.Data.Services.DataService`1.HandleRequest()
</stacktrace>
</innererror>
</error>

Removing everything older than 1 month (getting the count down to about 200 .nupkg files) fixes the solution.
Comments: Can anyone on this issue who have voted for, forward or give some more details of the packages that were there (package structure name etc) in the internal feed that caused it to throw the exception. I have been trying it and not able to repro. thanks for your help.