謎のエラーです助けてください

前提

replitのjsで、Discordの地震ボットを作っています
ですが、不明のエラーが出てしまいました

実現したいこと

▲▲機能を動作するようにする

###コード

const { Client, Intents } = require('discord.js')

const Keyv = require('keyv')

const http = require('http');
http.createServer(function (req, res) {
  res.write("online");
  res.end();
}).listen(8080);

const db = new Keyv('sqlite://registerchannel.sqlite', {
  table: 'registerchannel'
})

//intentsのoption
const option = {
  intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES,Intents.FLAGS.GUILD_VOICE_STATES,Intents.FLAGS.GUILD_MEMBERS,Intents.FLAGS.GUILD_MESSAGE_REACTIONS],
  partials: ['MESSAGE', 'CHANNEL', 'REACTION']

}
//client
const client = new Client(option)

client.login(process.env.token)

client.on('ready',() => {
console.log('Successfully login!')
})

setInterval(_ => client.user.setActivity({ name: `日本の災害を監視中｜ver:2.1.1｜ping:${client.ws.ping}ms` }), 30000);

const { WebSocket } = require('ws')
// WebSocket に接続して JSONをもらおう
const ws = new WebSocket('wss://api.p2pquake.net/v2/ws')

ws.onmessage = async (data) => {
// JSON化しちゃおう
const o = JSON.parse(data.data)

const scalesjp = {
  "10": "1",
  "20": "2",
  "30": "3",
  "40": "4",
  "45": "5弱",
  "50": "5強",
  "55": "6弱",
  "60": "6強",
  "70": "7"
};
const scalesen = {
  "10": "1",
  "20": "2",
  "30": "3",
  "40": "4",
  "45": "5-",
  "50": "5+",
  "55": "6-",
  "60": "6+",
  "70": "7"
};
const eewjp = {
  "10": "地震速報",
  "20": "地震速報",
  "30": "地震速報",
  "40": "緊急地震速報",
  "45": "緊急地震速報",
  "50": "緊急地震速報",
  "55": "緊急地震速報",
  "60": "緊急地震速報",
  "70": "緊急地震速報"
};
const eewen = {
  "10": "EarthquakeBulletin",
  "20": "EarthquakeBulletin",
  "30": "EarthquakeBulletin",
  "40": "EarthquakeEarlyWarning",
  "45": "EarthquakeEarlyWarning",
  "50": "EarthquakeEarlyWarning",
  "55": "EarthquakeEarlyWarning",
  "60": "EarthquakeEarlyWarning",
  "70": "EarthquakeEarlyWarning"
};
if(data.data)o = JSON.parse(data.data)  
 ws.on('message', async data => {
   const o = JSON.parse(data.data)
   if(o.code == 551){
    let msindo = o.earthquake.maxScale
    let atime = o.earthquake.time
    let domesticTsunami = o.earthquake.domesticTsunami
    let depth = o.earthquake.hypocenter.depth
    let magunitude = o.earthquake.hypocenter.magnitude
    let hyposentername = o.earthquake.hypocenter.name
    let pointskazu = o.points.length
let register = await db.get('registerchannel')
register.forEach(ch => {
  const embed = new MessageEmbed().setColor("YELLOW").setDescription(`${eewjp[`${o.earthquake.maxScale}`]}\n・地震が発生しました。落ち着いて行動してください。倒れやすい家具などからはなれてください。火の始末は、後にしてください。\n・最大震度${scalesjp[`${o.earthquake.maxScale}`]} | 深さ${o.earthquake.hypocenter.depth}km | M${o.earthquake.hypocenter.magnitude}| 震源地:${o.earthquake.hypocenter.name}\n\n${eewen[`${o.earthquake.maxScale}`]}\n・An earthquake has occurred. Please act calmly. Please get away from furniture that is easy to fall down. Please take care of the fire later.\n・MaximumSeismic${scalesen[`${o.earthquake.maxScale}`]} | Depth${o.earthquake.hypocenter.depth}km | M${o.earthquake.hypocenter.magnitude} | Epicenter:${o.earthquake.hypocenter.name} `);
client.channels.cache.get(ch).send({ embeds: [embed].catch(c => console.log(`${c.id}に送信できませんでした`))})
   
client.on('messageCreate',async (message) => {
  const prefix = "!"
  if (message.author.bot || message.channel.type === "dm") return;
  if (message.content.indexOf(prefix) !== 0) return
  const args = message.content.slice(prefix.length).trim().split(/ +/g);
  const command = args.shift().toLowerCase();
  if(command === "register"){
    message.channel.send(`<#${message.channel.id}>を地震情報通知チャンネルに設定しています...`)
    const channels = await db.get('registerchannel')
    let set
    let save
    if(channels){
      let roles = channels.join(',');
      set =`${roles},${message.channel.id}`
    }
    else set = `${message.channel.id}`
    save = set.split(',');
    await db.set('registerchannel',save)
    await message.channel.send('正常に完了しました。\n:warning: 一度設定してしまったチャンネルは登録を解除することができません。')
  }

  if(command === "send"){
    let register = await db.get('registerchannel')
   register.forEach(ch => {
    client.channels.cache.get(ch).send('一斉送信テスト！') 
  })
}
  })
})
  }
    })
      }

発生している問題・エラーメッセージ

/home/runner/Pei-Bu-Yong-eewbot/index.j s:84 if(data.data)o JSON.parse(data.data) =

TypeError: Assignment to constant varia ble.

at WebSocket.ws.onmessage (/home/ru nner/Pei-Bu-Yong-eewbot/index.js:84:16) at WebSocket.onMessage (/home/runne r/Pei-Bu-Yong-eewbot/node_modules/ws/li b/event-target.js:199:18)

at Receiver.receiverOnMessage (/hom e/runner/Pei-Bu-Yong-eewbot/node_module s/ws/lib/websocket.js:1169:20)

at Receiver.dataMessage (/home/runner/Pei-Bu-Yong-eewbot/node_modules/ws/l ib/receiver.js:528:14)

at Receiver.getData (/home/runner/P ei-Bu-Yong-eewbot/node_modules/ws/lib/receiver.js:446:17)

repl process died unexpectedly: exit status 1

該当のソースコード

node.js

試したこと

ネットで調べましたが、わかりませんでした

補足情報（FW/ツールのバージョンなど）

https://replit.com/@jgmg6jgmgodptgd/Pei-Bu-Yong-eewbot
こちらです

y_waiwai

2022/07/15 11:43

コードを提示しましょう

Zuishin

2022/07/15 22:29

エラーに謎はありません。謎なのはコードです。 > const o = JSON.parse(data.data) > if(data.data)o = JSON.parse(data.data) const 宣言した o に再代入しようとしているのでエラーになっています。 let に直せば、とりあえずこのエラーは消えます。