convert tensorflow model to tensorflow.js handling version error

operation_mapper.ts:125 Uncaught (in promise) Error: Tensorflow Op is not supported: AddV2
    at t.mapNode (operation_mapper.ts:125)
    at operation_mapper.ts:86
    at Array.reduce (<anonymous>)
    at t.transformGraph (operation_mapper.ts:85)
    at t.<anonymous> (graph_model.ts:125)
    at callbacks.ts:17
    at Object.next (callbacks.ts:17)
    at a (callbacks.ts:17)

 Above error comes  when your  tensorflow version are different in different places.

suppose you download tensorflowjs=1.2.3
and your index.html file contain this code for connecting tensorflowjs model to your browser
<script src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@1.0.0/dist/tf.min.js"></script>

then this error comes.
convert this code to
<script src="https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@1.2.3/dist/tf.min.js"></script>
and error has been removed.