An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at GS.PflanzenCMS.UserControls.Video.UpdateMetaData(PageMetaData data)
at GS.PflanzenCMS.Classes.PageMetaData.AddComponents(IEnumerable`1 components)
at GS.PflanzenCMS.Classes.PageMetaData.AddComponents(IEnumerable`1 components)
at GS.PflanzenCMS.Controllers.CMSController.Index(Nullable`1 version)