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_b29005dcf9e945f5b11cffbf19eec2f9.Execute() in D:\dynamicweb.net\Solutions\Dynamicweb\hctswift.cloud.dynamicweb-cms.com\files\Templates\Designs\Swift\Navigation\BreadcrumbNavigation.cshtml:line 31
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     			while (breadCrumbNavigationTree.Count > 0)
 12     			{
 13     				var currentNode = breadCrumbNavigationTree.Pop();
 14     				if (currentNode.ShowInBreadcrumb)
 15     				{
 16     					if (!string.IsNullOrEmpty(currentNode.Link))
 17     					{
 18     						<li class="breadcrumb-item">
 19     							<a href="@currentNode.Link">
 20     								@currentNode.Name
 21     							</a>
 22     						</li>
 23     					}
 24     					else
 25     					{
 26     						<li class="breadcrumb-item">
 27     							@currentNode.Name
 28     						</li>
 29     					}
 30     				}
 31     				foreach (var nextNode in currentNode.Nodes)
 32     				{
 33     					breadCrumbNavigationTree.Push(nextNode);
 34     				}
 35     			}
 36     		}
 37     		@if (showProductInBreadcrumb && !string.IsNullOrEmpty(Dynamicweb.Context.Current.Request.QueryString["ProductID"]))
 38     		{
 39     			string productid = Dynamicweb.Context.Current.Request.QueryString["ProductID"];
 40     			string variantid = Dynamicweb.Context.Current.Request.QueryString["VariantID"];
 41     			var product = Dynamicweb.Ecommerce.Services.Products.GetProductById(productid, variantid, Dynamicweb.Ecommerce.Common.Context.LanguageID);
 42     			if (product != null)
 43     			{
 44     				<li class="breadcrumb-item">
 45     					@product.Name
 46     				</li>
 47     			}
 48     		}
 49     	</ol>
 50     }
 51     else if (Model.Nodes.Count() < 2)
 52     {
 53     	<div class="alert alert-dark m-0" role="alert">
 54     		<span>@Translate("Breadcrumb navigation: The navigation will be shown here, if any")</span>
 55     	</div>
 56     }
 57