Google cloud storage upload issue

gc-storage-upload.js

const {Storage} = require('@google-cloud/storage')
const storage = new Storage();
const bucket = storage.bucket('fe-store');

async function upload() {
  const largeCustomMeta = () => {
    let str = '';
    for (let i = 0; i < 2.1e6; i++) {
      str += 'a';
    }
    return str;
  };

  const file = bucket.file('1.txt');
  await file.save('test data', {
    metadata: {
      metadata: {
        custom: largeCustomMeta(),
      },
    },
  });
}

(async () => {
  try {
    await upload();
  } catch (err) {
    console.log(err);
  }
})();