Mongo -重复文档的ObjectIds是否不同？

const MongoClient = require('mongodb').MongoClient;

async function test() {
  const uri = 'mongodb://localhost:27017';
  const client = new MongoClient(uri);

  try {
    await client.connect();

    const db = client.db('test');
    const collection = db.collection('documents');

    // 插入两个重复文档
    const doc1 = { name: 'John' };
    const doc2 = { name: 'John' };
    await collection.insertMany([doc1, doc2]);

    // 查询文档的ObjectIds
    const result = await collection.find({ name: 'John' }).toArray();
    console.log(result[0]._id);
    console.log(result[1]._id);
  } finally {
    await client.close();
  }
}

test().catch(console.error);