Ticket migration error

hallo,
i got this error

my code:
const MongoClient = require(“mongodb”).MongoClient
const ObjectId = require(“mongodb”).ObjectId
const MongoError = require(“mongodb”).MongoError
require(“dotenv”).config()

/**

  • Ticket: Migration
  • Update all the documents in the movies collection, such that the
  • “lastupdated” field is stored as an ISODate() rather than a string.
  • The Date.parse() method build into Javascript will prove very useful here!
  • Refer to CRUD Operations
    */

// This leading semicolon (:wink: is to signify to the parser that this is a new expression. This expression is an
// Immediately Invoked Function Expression (IIFE). It’s being used to wrap this logic in an asynchronous function
// so we can use await within.
// To read more about this type of expression, refer to IIFE - MDN Web Docs Glossary: Definitions of Web-related terms | MDN
;(async () => {
try {
const host = process.env.MFLIX_DB_URI
const client = await MongoClient.connect(host, { useNewUrlParser: true })
const mflix = client.db(process.env.MFLIX_NS)

// TODO: Create the proper predicate and projection
// add a predicate that checks that the `lastupdated` field exists, and then
// check that its type is a string
// a projection is not required, but may help reduce the amount of data sent
// over the wire!
const predicate = { lastupdated: { $exists: true, $type: "string" } }
const projection = {}
const cursor = await mflix
  .collection("movies")
  .find(predicate, projection)
  .toArray()
const moviesToMigrate = cursor.map(({ _id, lastupdated }) => ({
  updateOne: {
    filter: { _id: ObjectId(_id) },
    update: {
      $set: { lastupdated: new Date(Date.parse(lastupdated)) },
    },
  },
}))
console.log(
  "\x1b[32m",
  `Found ${moviesToMigrate.length} documents to update`,
)
// TODO: Complete the BulkWrite statement below
const { modifiedCount } = await "some bulk operation"

console.log("\x1b[32m", `${modifiedCount} documents updated`)
client.close()
process.exit(0)

} catch (e) {
if (
e instanceof MongoError &&
e.message.slice(0, “Invalid Operation”.length) === “Invalid Operation”
) {
console.log("\x1b[32m", “No documents to update”)
} else {
console.error("\x1b[31m", Error during migration, ${e})
}
process.exit(1)
}
})()

solved it…forgot to add some code the bulk code