I’m new to node js, I built a server that uses mysql for the database, and after a few hours of running the server, an error appears and a crash occurs. I wanted to see if anyone could see something in my code.

const mysql = require("mysql");
const express = require('express');
const http = require('node:http');
const bodyparser = require('body-parser');
const Connection = require("mysql/lib/Connection");
// fastify

const con = mysql.createPool({
  connectionLimit : 100,
  host: 'localhost',
  user: 'root',
  password: 'password',
  database: 'pepco'
});


var app = express();
var cnt = 0;


const hostname = '192.168.100.23';
const port = 80;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello, World!n');
});

app.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});
app.use(express.static("/Source/Test/"));
var urlparser = bodyparser.urlencoded({ extended: false })
let date = new Date();
let formattedDate = `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()} ${date.getUTCHours() + 4}:${(date.getUTCMinutes() + 30) % 60}:${date.getUTCSeconds()}`;
console.log(formattedDate);
con.getConnection(function (err,connection) {
  if (err) 
    {
      connection.release();
      return
      }
  console.log("Connected!");
});
app.post('/Submitted', urlparser, (req, res) => {
  res.sendFile("/Source/Test/Submitted/OK.html");
  console.log(req.body.subjectInput)
  console.log(req.body.taskInput)

  var sql = `SELECT COUNT(*) FROM Persons;`;
  console.log(sql);
  con.query(sql, function (err, result) {
    if(!err)
      {
        cnt = JSON.stringify(result[0]).replace("{"COUNT(*)":","").replace("}","");
        console.log(cnt);
      }

  
  if(cnt == "0" )
  {
    sql = `INSERT INTO Persons VALUES (${0},'${req.body.subjectInput}','${req.body.taskInput}','${formattedDate}')`;
    console.log(sql);
    con.query(sql, function (err, result) {
      if (err) throw err;
      console.log("insert");
    });
  }
else{
  sql = `select *from Persons ORDER BY id DESC LIMIT 1`;
  con.query(sql, function (err, result) {
    if (err) throw err;
    let id = result[0].ID + 1;
    sql = `INSERT INTO Persons VALUES (${id},'${req.body.subjectInput}','${req.body.taskInput}','${formattedDate}')`;
    console.log(sql);
    con.query(sql, function (err, result) {
      if (err) throw err;
      console.log("insert");
    });
  });
}
}); 
});
app.get("/", (req, res) => {
  res.sendFile("/Source/Test/Index.html");
});

app.get('/Admin/login', (req, res) => {
  res.sendFile("/Source/Test/Admin/login/login.html");
  console.log("req");
});
app.post('/Admin/update', urlparser, (req, res) => {
  let arr = [] ;
  console.log("update!");
  var sql = `SELECT * FROM pepco.Persons;`;
  con.query(sql, function (err, result) {
    if (err) throw err;
    arr = result;
    console.log(arr);
    res.send(arr);
    });

});

node:events:497
throw er; // Unhandled ‘error’ event
^

Error: Packets out of order. Got: 0 Expected: 3
at Parser._tryReadPacketHeader (C:SourceTestnode_modulesmysqllibprotocolParser.js:470:15)
at Parser.write (C:SourceTestnode_modulesmysqllibprotocolParser.js:33:29)
at Protocol.write (C:SourceTestnode_modulesmysqllibprotocolProtocol.js:38:16)
at Socket. (C:SourceTestnode_modulesmysqllibConnection.js:88:28)
at Socket. (C:SourceTestnode_modulesmysqllibConnection.js:526:10)
at Socket.emit (node:events:519:28)
at addChunk (node:internal/streams/readable:559:12)
at readableAddChunkPushByteMode (node:internal/streams/readable:510:3) at Readable.push (node:internal/streams/readable:390:5)
at TCP.onStreamRead (node:internal/stream_base_commons:191:23)
Emitted ‘error’ event on Connection instance at:
at Connection._handleProtocolError (C:SourceTestnode_modulesmysqllibConnection.js:423:8)
at Protocol.emit (node:events:519:28)
at Protocol._delegateError (C:SourceTestnode_modulesmysqllibprotocolProtocol.js:398:10)
at Protocol.handleParserError (C:SourceTestnode_modulesmysqllibprotocolProtocol.js:380:10)
at Parser._tryReadPacketHeader (C:SourceTestnode_modulesmysqllibprotocolParser.js:478:10)
at Parser.write (C:SourceTestnode_modulesmysqllibprotocolParser.js:33:29)
[… lines matching original stack trace …]
at Socket.emit (node:events:519:28) {
code: ‘PROTOCOL_PACKETS_OUT_OF_ORDER’,
fatal: true
}

i want to fix this error