I close the node terminal by mistake in the angle service create

When I save something to the bd (MongoDB) from the app, I close the node server in the terminal, however it saves the data.

I have in the file api_v1.js:

const express = require('express');
const router = express.Router();

const Profesor = require('../models/profesor');

router.post('/profesores', (req, res) => {
    delete req.body._id;
    Profesor.create(req.body, (err, Profesor) =>{
        if(err){
            res.json(err)
        }else{
            res.json(profesor);
        }
    });
});

On the browser terminal:

    Source map error: TypeError: NetworkError when attempting to fetch resource.
Resource URL: http://localhost:3000/main.bundle.js
Source Map URL: main.bundle.map[Learn More]

In the node console it says:

C:\Users\leand\Documents\Universidad\Software III\PracticasProyecto\colegio-crud-app\node_modules\mongodb\lib\utils.js:132
      throw err;
      ^

ReferenceError: profesor is not defined
    at Profesor.create (C:\Users\leand\Documents\Universidad\Software III\PracticasProyecto\colegio-crud-app\routes\api_v1.js:20:22)
    at Function.<anonymous> (C:\Users\leand\Documents\Universidad\Software III\PracticasProyecto\colegio-crud-app\node_modules\mongoose\lib\model.js:3954:16)...