The deployment cannot be updated because the new cscfg file specifies a different VM size for at least one of the roles in ...

The deployment cannot be updated because the new cscfg file specifies a different VM size for at least one of the roles in the deployment. To update the deployment, you must select "Allow VM size or role count to be updated" in the Upgrade Deployment dialog box. IMPORTANT: This type of update causes the deployment to be rebuilt. Any information that is stored locally will be lost