E11000 duplicate key error index in mongodb mongoose

Question

Following is my user schema in user.js model -

var userSchema = new mongoose.Schema({
    local: {
        name: { type: String },
         


        

Answer 1

I got this same issue when I had the following configuration in my config/models.js

module.exports.models = {
  connection: 'mongodb',
  migrate: 'alter'
}

Changing migrate from 'alter' to 'safe' fixed it for me.

module.exports.models = {
  connection: 'mongodb',
  migrate: 'safe'
}