Error: Worksheet name already exists: My Sheet

Error: Worksheet name already exists: My Sheet

var Excel = require('exceljs');

function test(invoices) {

var workbook = new Excel.Workbook();

var worksheet = workbook.addWorksheet('My Sheet');

worksheet.getRow(1).font = { bold: true };
worksheet.getRow(1).alignment = { horizontal: 'center', vertical: 'middle', wrapText: true };
worksheet.getColumn('B').alignment = { horizontal: 'center' };
worksheet.getCell('A1').value = 'Invoice Number';
worksheet.getCell('B1').value = 'Invoice Total';
worksheet.getColumn('A').width = 15;
worksheet.getColumn('B').width = 10;

for (var i = 0; i < invoices.length; i++) {

worksheet.getCell('A' + (i + 2)).value = invoices[i].InvoiceNumber;

worksheet.getCell('D' + (i + 2)).value = invoices[i].InvoiceTotal;

}

return workbook;

}

It's working on ExcelJS version 10.0.0 but when update to new version of ExcelJS (1.14.0) getting this error

Node version : 12.6.0