openxml克隆节点方法导致数据在C#中向右移动列

using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

public void MoveDataRight(string filePath, string sheetName, int startColumn, int endColumn)
{
    using (SpreadsheetDocument document = SpreadsheetDocument.Open(filePath, true))
    {
        WorkbookPart workbookPart = document.WorkbookPart;
        Sheet sheet = workbookPart.Workbook.Descendants<Sheet>().FirstOrDefault(s => s.Name == sheetName);
        
        if (sheet != null)
        {
            WorksheetPart worksheetPart = (WorksheetPart)workbookPart.GetPartById(sheet.Id);
            Worksheet worksheet = worksheetPart.Worksheet;
            SheetData sheetData = worksheet.GetFirstChild<SheetData>();
            
            foreach (Row row in sheetData.Elements<Row>())
            {
                foreach (Cell cell in row.Elements<Cell>())
                {
                    string cellReference = cell.CellReference.Value;
                    string columnName = GetColumnName(cellReference);
                    int columnNumber = GetColumnNumber(columnName);
                    
                    if (columnNumber >= startColumn && columnNumber <= endColumn)
                    {
                        // 克隆节点并插入到下一列
                        Cell clonedCell = (Cell)cell.CloneNode(true);
                        string newCellReference = IncrementCellReference(cellReference);
                        clonedCell.CellReference = newCellReference;
                        row.InsertAfter(clonedCell, cell);
                    }
                }
            }
            
            worksheet.Save();
        }
    }
}

private string GetColumnName(string cellReference)
{
    // 从单元格引用中提取列名
    string columnName = Regex.Replace(cellReference, @"[\d]", string.Empty);
    return columnName;
}

private int GetColumnNumber(string columnName)
{
    // 将列名转换为列号
    int columnNumber = 0;
    int mulitplier = 1;
    
    foreach (char c in columnName.Reverse())
    {
        columnNumber += mulitplier * (c - 'A' + 1);
        mulitplier *= 26;
    }
    
    return columnNumber;
}

private string IncrementCellReference(string cellReference)
{
    // 将单元格引用向右移动一列
    string columnName = GetColumnName(cellReference);
    int columnNumber = GetColumnNumber(columnName);
    columnNumber++;
    string newColumnName = GetColumnNameFromNumber(columnNumber);
    string newCellReference = cellReference.Replace(columnName, newColumnName);
    return newCellReference;
}

private string GetColumnNameFromNumber(int columnNumber)
{
    // 将列号转换为列名
    StringBuilder columnName = new StringBuilder();
    
    while (columnNumber > 0)
    {
        int remainder = (columnNumber - 1) % 26;
        columnName.Insert(0, (char)('A' + remainder));
        columnNumber = (columnNumber - 1) / 26;
    }
    
    return columnName.ToString();
}