After update and saving the model to store without connecting backend gives error

I am trying to update my mode just only store without connecting backend. after it's done successfully I will retrive the updated model using it's id.

for that, I am trying to push my model to store ( updating the existing model in store ) but getting error.

any one hlpe me?

here is my code :

import Ember from 'ember';

export default Ember.Route.extend({
  model: function(params) {

    if(this.store.hasRecordForId('card-list', params.id)){
        return this.store.peekRecord('card-list', params.id );//getting
    }
  },
  actions:{
    formValidateBeforeNext:function(){

        var model = this.controllerFor(this.routeName).get('model');
        var modelId = this.controllerFor(this.routeName).get('model').get("id");
        var oneTimeFee = this.controllerFor(this.routeName).get('model').get("oneTimeFee");
        var monthlyInstalmentAmount = this.controllerFor(this.routeName).get('model').get("monthlyInstalmentAmount");

        console.log( "model would be:-" , JSON.parse(JSON.stringify(model)) );

        this.store.push(JSON.parse(model));//updating without connect to backend,but throws error

        console.log( "store data", this.store.peekRecord('card-list', modelId ) )

        this.transitionTo('cs2i.balance.balanceReview', {id:modelId});

    }
  }
});