'WARNING: Tried to load angular more than once.'

We are trying to include Ionic (v1) in an existing AngularJS (v1.x) web application under development. That web application includes AngularJS already in index.html. Now to includes Ionic, we are including lib/ionic/js/ionic.bundle.js, which results in a warning in condole - > 'WARNING: Tried to load angular more than one.'. Excluding angular.min.js did not work, resulted in errors.
Two particular piont of concern are:

  1. What are we missing? Is there a way to avoid this warning?
  2. Are there some repercussions of including both: lib/ionic/js/ionic.bundle.js and angular.min.js, and living with this warning in console?
    Thanks in advance,

what is written at place of angular.module(‘MyApp’,[‘ionic’]) in .js file?

It is the same i.e. angular.module(‘MyAppName’,[‘ionic’]) in app.js, however, before ‘ionic’, there are many other dependencies of both AngularJS and of our custom built ones.

check .js files in .html page… any .js was not included according dependencies