我目前正在学习后端，也不熟悉它
gritting this error calls 'usefindandmodify' is invalid operation这是什么错误？
x1c 0d1x的数据
它还说如果（VALID_OPTIONS.indexOf（key）= -1）抛出新错误（\ ${key}是无效的选项。）; ^

import mongoose from "mongoose";
import cors from "cors";

const app = express();

app.use(express.json({ limit: "30mb", extender: true }));
app.use(express.urlencoded({ limit: "30mb", extender: true }));
app.use(cors());

const CONNECTION_URL =
"priyanshu74:****@cluster0.2l3k1.mongodb.net/myFirstDatabase?retryWrites=true&w=majorityconst PORT = process.env.PORT || 5000"

mongoose
  .connect(CONNECTION_URL, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })
  .then(() =>
    app.listen(PORT, () => console.log(`server running on port: ${PORT}`))
  )
  .catch((error) => console.log(error.message));

mongoose.set("useFindAndModify", false);

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