When importing HTML content to a RadFlowDocument and exporting it to PDF format, the following error message occurs:

System.ArgumentException: 'The document element is associated with another parent. (Parameter 'item')'

   at Telerik.Windows.Documents.Fixed.Model.Collections.DocumentElementCollection`2.VerifyDocumentElementOnInsert(T item)
   at Telerik.Windows.Documents.Core.Data.DocumentElementCollectionBase`2.Add(T item)
   at Telerik.Windows.Documents.Fixed.Model.Editing.FixedContentEditor.Append(PositionContentElement element)
   at Telerik.Windows.Documents.Fixed.Model.Editing.FixedContentEditor.Draw(PositionContentElement element)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Layout.ContentElementLayoutElementBase`1.Draw(DrawLayoutElementContext context)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.Draw(IEnumerable`1 lineElements, DrawLayoutElementContext context)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.Draw(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCell.Draw(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawCellContent(FixedContentEditor editor, TableCell cell)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableCells(FixedContentEditor editor, Int32 rowIndex, TableCellCollection cells)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableRows(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.Draw(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCell.Draw(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawCellContent(FixedContentEditor editor, TableCell cell)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableCells(FixedContentEditor editor, Int32 rowIndex, TableCellCollection cells)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableRows(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.Telerik.Windows.Documents.Fixed.Model.Editing.Flow.IDrawArrangedElement.DrawArrangedElement(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Flow.SectionInfo.DrawArrangedElement(IBlockElement blockElement, Double horizontalOffset, Double verticalOffset)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Utils.SectionInfoExtensions.DrawArrangedElements(SectionInfo section, IList`1 elements)
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.Draw()
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.StartNewPage(SectionProperties sectionProperties)
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.StartNewPage()
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.AddBlock(IBlockElement blockElement, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportSection(Section section, RadFixedDocumentEditor editor)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportDocument(RadFlowDocument document, RadFixedDocumentEditor editor)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportInternal()
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.Export()
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider.ExportToFixedDocument(RadFlowDocument document, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider.ExportOverride(RadFlowDocument document, Stream output, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Export(T document, Stream output, Nullable`1 timeout)
   at _1713205HtmlToPdf.Program.Main(String[] args) in C:\Users\dyordano\OneDrive - Progress Software Corporation\MyProjects\1713205HtmlToPdf\Program.cs:line 46