source.on is not a function - node.js

Question

const express = require('express');
const router = express.Router();
const axios = require("axios");
var FormData = require('form-data');
var data = new FormData();
router.post('/someroute', async (req, res) => {
try {
data.append("ImageFiles", req.files.ImageFiles) // in ImageFiles storing signle object
const result = await axios({
method: 'post',
url: 'someurl',
headers: {'Authorization': req.headers['authorization'], ...data.getHeaders()},
data: data
}).catch((e) => console.log(e, "error"));
console.log(result);
} catch (error){
console.log(error, "error")
}
});
module.exports = router;
if i add JSON.stringify it will work, but another backend always think that it's not string.
Error stack
[0] TypeError: source.on is not a function
[0] at Function.DelayedStream.create (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_modul
es\delayed-stream\lib\delayed_stream.js:33:10)
[0] at FormData.CombinedStream.append (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_modu
les\combined-stream\lib\combined_stream.js:45:37)
[0] at FormData.append (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_modules\form-data\l
ib\form_data.js:75:3)
[0] at C:\Users\someuser\PhpstormProjects\someuser\someproject\routes\api\proctoring\proctoring.js:18:14
[0] at Layer.handle [as handle_request] (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_mo
dules\express\lib\router\layer.js:95:5)
[0] at next (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_modules\express\lib\router\rou
te.js:137:13)
[0] at Route.dispatch (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_modules\express\lib\
router\route.js:112:3)
[0] at Layer.handle [as handle_request] (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_mo
dules\express\lib\router\layer.js:95:5)
[0] at C:\Users\someuser\PhpstormProjects\someuser\someproject\node_modules\express\lib\router\index.js:
281:22
[0] at Function.process_params (C:\Users\someuser\PhpstormProjects\someuser\someproject\node_modules\exp
ress\lib\router\index.js:335:12) error
If i add JSON stringify, it will work. But it's not accurate. Please help. I sending img from backend to another backend