Passport local mongoose give me 11000code error

I build simple user register app. My User model this:

const mongoose = require('mongoose');
const passportLocalMongoose = require('passport-local-mongoose')
const { Schema } = mongoose;

const userSchema = new Schema({
  email: {
    type: String,
  },
  phoneNumber: {
    type: String
  },
  firstName: {
    type: String
  },
  lastName: {
    type: String
  },
  password: {
    type: String
  },
  googleId: {
    type: String
  },
  facebookId: {
    type: String
  },
  avatar: {
    type: String
  },
  role: {
    type: String,
    default: 'Member',
    enum: ['Admin', 'Member', 'Merchant']
  },
  resetPasswordToken: { type: String },
  resetPasswordExpires: { type: Date },
},{
  timestamps: true
}));

userSchema.plugin(passportLocalMongoose, {usernameField: 'email', usernameQueryFields:['email']});

module.exports = mongoose.model('User', userSchema);

When send data first time was success but second time I get this error:

{
    "index": 0,
    "code": 11000,
    "keyPattern": {
        "username": 1
    },
    "keyValue": {
        "username": null
    }
}

How to fix it or find error?
Thanks