const express = require('express');
const { uuid } = require('uuidv4');


const app = express();

app.use(express.json())

const projects = [];

app.post('/projects', (req,res)=>{

 const { title, owner } = req.body;
 
  const project = { id: uuid() , title, owner };
  projects.push(project);

  return res.json(project)
})

app.listen(6690, ()=>{
  console.log('Started!👌');
});

when i execute nodemon:

[nodemon] restarting due to changes...
[nodemon] starting `node src/index.js`
node:events:498
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::6690
    at Server.setupListenHandle [as _listen2] (node:net:1330:16)
    at listenInCluster (node:net:1378:12)
    at Server.listen (node:net:1465:7)
    at Function.listen (C:\Users\Lord\desktop\projetos\bootcamp\backend\node_modules\express\lib\application.js:618:24)
    at Object.<anonymous> (C:\Users\Lord\desktop\projetos\bootcamp\backend\src\index.js:21:5)
    at Module._compile (node:internal/modules/cjs/loader:1103:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1155:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
Emitted 'error' event on Server instance at:
    at emitErrorNT (node:net:1357:8)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  code: 'EADDRINUSE',
  errno: -4091,
  syscall: 'listen',
  address: '::',
  port: 6690
}
[nodemon] app crashed - waiting for file changes before starting...

but if i update one more time, works fine:

[nodemon] restarting due to changes...
[nodemon] starting `node src/index.js`
Started!👌

if i update one more time, and one more time and... will happen all over again node v16.14.0 nodemon v2.0.14

if i update one more time, and one more time and... will happen all over again node v16.14.0 nodemon v2.0.14