Deploying SSRS Error - The model ID of the submitted model must match that of the current model.

Problem:

When I deploy a report model, it shows a deployment error: The model ID of the submitted model must match that of the current model.

Reason: 

Because I try to deploy a model in a NEW report project which has the same model name in a previous report project.

Solution: 

Go to the reporting web site (http://localhost/reports), go to the models folder and delete the
model item. Then re-deploy it.