您好，我想从https://jsonplaceholder.typicode.com/posts和https://jsonplaceholder.typicode.com/users植入数据
我为User定义了mongodb模式，比如

const mongoose = require("mongoose");

const UserSchema = new mongoose.Schema({
  name: {
    type: String,
  },
  username: {
    type: String,
  },
  email: {
    type: String,
  },
  address: {
    street: {
      type: String,
    },
    suite: {
      type: String,
    },
    city: {
      type: String,
    },
    zipcode: {
      type: String,
    },
    geo: {
      lat: {
        type: String,
      },
      lng: {
        type: String,
      },
    },
  },
  phone: {
    type: String,
  },
  website: {
    type: String,
  },
  company: {
    name: {
      type: String,
    },
    catchPhrase: {
      type: String,
    },
    bs: {
      type: String,
    },
  },
});

module.exports = mongoose.model("User", UserSchema);

和用于Post

const mongoose = require("mongoose");

const PostSchema = new mongoose.Schema({
  title: {
    type: String,
  },
  body: {
    type: String,
  },
  userId: {
    type: mongoose.Schema.Types.ObjectId,
    ref: "User",
  },
});

module.exports = mongoose.model("Post", PostSchema);

我正在使用seeder函数（如

const importData = async () => {

try {
    await Post.deleteMany();
    await User.deleteMany();

    const createdUsers = await User.insertMany(users);
    console.log("created users", createdUsers);

    const samplePosts = await Post.insertMany(posts);
    console.log("sampleProducts", samplePosts);
    process.exit();
  } catch (error) {
    console.error(`${error}`.red.inverse);
    process.exit(1);
  }
};

但是，我得到的错误为
验证错误：userId：由于“BSONTypeError”，在路径“userId”中为值“1”（类型编号）强制转换为ObjectId失败
这个错误意味着什么？我该如何解决这个错误？