Нужно записать данные в последний столбец таблицы Excel с заголовком и значением

Question

        FileInputStream file = new FileInputStream(
                    new File(System.getProperty("user.dir") + "\\Data\\ReturnsAndReplacementsEcomm.xlsx"));

        XSSFWorkbook workbook = new XSSFWorkbook();
        XSSFSheet sheet = workbook.getSheet("TestData");

        int lastRow = sheet.getLastRowNum();
        XSSFCell cell = sheet.getRow(lastRow).createCell(lastRow);
        cell.setCellValue("ReturnReference");

        cell = sheet.getRow(lastRow).createCell(lastRow);
        cell.setCellValue(ReturnReference);

        file.close();

        FileOutputStream outFile = new FileOutputStream(
                new File(System.getProperty("user.dir") + "\\Data\\ReturnsAndReplacementsEcomm.xlsx"));
        workbook.write(outFile);

        outFile.close();