Delete data from more than week ago don't delete data from last month

I tried this in my end and it works. How to you create new ObjectId? Can you try it with Mongoose?

const mongoose = require('mongoose');

let remove = await mongoose.connection.db.collection("mycollection").deleteMany({
  _id: {
    $lt: mongoose.Types.ObjectId(
      Math.floor(new Date(Date.now() - 7 * 24 * 60 * 60 * 1000) / 1000).toString(16) + '0000000000000000'
    ),
  }
});