Error executing template "Designs/Swift/Navigation/BreadcrumbNavigation.cshtml"
System.ArgumentException: 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 Dynamicweb.Ecommerce.Products.GroupRelation.GetGroupRelationsByChildId(String childId)
   at Dynamicweb.Ecommerce.Products.Group.get_IsTopGroup()
   at Dynamicweb.Ecommerce.Shops.Shop.GetTopLevelGroups(String languageId)
   at Dynamicweb.Ecommerce.Frontend.Navigation.GroupNavigationTreeNodeProvider.GetGroupsBySettings(PageNavigationSettings ecomSettings)
   at Dynamicweb.Ecommerce.Frontend.Navigation.GroupNavigationTreeNodeProvider.GetGroups(NavigationTreeNode parent, Page page)
   at Dynamicweb.Ecommerce.Frontend.Navigation.GroupNavigationTreeNodeProvider.GetNodes(NavigationContext context, NavigationSettings settings, NavigationTreeNode parent)
   at System.Linq.Enumerable.<SelectManyIterator>d__17`2.MoveNext()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at Dynamicweb.Frontend.Navigation.NavigationService.FilterNodesByExpandMode(NavigationContext context, NavigationSettings settings, NavigationTreeNode parent, IEnumerable`1 nodes, Int32 nodesLevel)
   at Dynamicweb.Frontend.Navigation.NavigationService.GetNavigationNodes(NavigationContext context, NavigationSettings settings, NavigationTreeNode parent)
   at Dynamicweb.Frontend.Navigation.NavigationTreeNodeViewModel.get_Nodes()
   at CompiledRazorTemplates.Dynamic.RazorEngine_695db32eb142459684f0da990014b3b9.Execute() in D:\dynamicweb.net\Solutions\nextech\Superhome.swiftstaging.dynamicweb-cms.com\files\Templates\Designs\Swift\Navigation\BreadcrumbNavigation.cshtml:line 37
   at RazorEngine.Templating.TemplateBase.RazorEngine.Templating.ITemplate.Run(ExecuteContext context, TextWriter reader)
   at RazorEngine.Templating.RazorEngineService.RunCompile(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass16_0.<RunCompile>b__0(TextWriter writer)
   at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
   at Dynamicweb.Rendering.RazorTemplateRenderingProvider.Render(Template template)
   at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template)
   at Dynamicweb.Rendering.Template.RenderRazorTemplate()


  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.Navigation.NavigationTreeViewModel>
  2     
  3     @if (!Pageview.IsVisualEditorMode)
  4     {
  5     	string menuId = Model.Parameters.ContainsKey("menu-id") ? $"menu_{Model.Parameters["menu-id"].ToString().ToLower()}" : string.Empty;
  6     	bool showProductInBreadcrumb = Model.Parameters.ContainsKey("showProductInBreadcrumb") ? Dynamicweb.Core.Converter.ToBoolean(Model.Parameters["showProductInBreadcrumb"]) : false;
  7     
  8     	<ol class="breadcrumb small mb-0 @menuId">
  9     		@{
 10     			var breadCrumbNavigationTree = new Stack<Dynamicweb.Frontend.Navigation.NavigationTreeNodeViewModel>(Model.Nodes);
 11     
 12     			while (breadCrumbNavigationTree.Count > 0)
 13     			{
 14     				var currentNode = breadCrumbNavigationTree.Pop();
 15     				if (currentNode.ShowInBreadcrumb)
 16     				{
 17     					if (!string.IsNullOrEmpty(currentNode.Link))
 18     					{
 19     						<li class="breadcrumb-item">
 20     							<a href="@currentNode.Link">
 21     								@currentNode.Name
 22     							</a>
 23     						</li>
 24     					}
 25     					else
 26     					{
 27     						<li class="breadcrumb-item">
 28     							@currentNode.Name
 29     						</li>
 30     					}
 31     				}
 32     
 33     @*if (currentNode.Nodes.Count() == 0)
 34     {
 35     	<h1 style="visibility:hidden">@currentNode.Name</h1>
 36     }*@
 37     				foreach (var nextNode in currentNode.Nodes)
 38     				{
 39     					breadCrumbNavigationTree.Push(nextNode);
 40     				}
 41     			}
 42     		}
 43     		@if (showProductInBreadcrumb && !string.IsNullOrEmpty(Dynamicweb.Context.Current.Request.QueryString["ProductID"]))
 44     		{
 45     			string productid = Dynamicweb.Context.Current.Request.QueryString["ProductID"];
 46     			string variantid = Dynamicweb.Context.Current.Request.QueryString["VariantID"];
 47     			var product = Dynamicweb.Ecommerce.Services.Products.GetProductById(productid, variantid, Dynamicweb.Ecommerce.Common.Context.LanguageID);
 48     			if (product != null)
 49     			{
 50     				<li class="breadcrumb-item">
 51     					@product.Name
 52     				</li>
 53     			}
 54     		}
 55     
 56     	</ol>
 57     }
 58     else if (Model.Nodes.Count() < 2)
 59     {
 60     	<div class="alert alert-dark m-0" role="alert">
 61     		<span>@Translate("Breadcrumb navigation: The navigation will be shown here, if any")</span>
 62     	</div>
 63     }
 64