Project Server 2016 upgrade error - "The project schema has not been provisioned in Content database"

Upgrade to Project Server 2016 environment fails with below error message.

Migrate-SPProjectDatabase : The project schema has not been provisioned in

Content database '2013_ProjectWebApp'.

    Use the Upgrade-SPContentDatabase command to upgrade the Content database

and then retry the migration command

At line:1 char:1

+ Migrate-SPProjectDatabase

+ ~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo : InvalidArgument: (Microsoft.Offic...ProjectDatab

   ase:PSCmdletMigrateSPProjectDatabase) [Migrate-SPProjectDatabase], SPExcep

  tion

    + FullyQualifiedErrorId : Microsoft.Office.Project.Server.Cmdlet.PSCmdletM

   igrateSPProjectDatabase

 This is what you see in the PowerShell Cmdlet

Potential causes

=============

 1. The farm was created using PowerShell (and not using GUI), or

 2. The first release of Project/SharePoint Server 2016 binaries are installed.

Resolution

========= 

• This issue has been addressed in RTM version. You can find more information about the RTM release here

  https://blogs.office.com/2016/03/14/sharepoint-2016-rtm-and-the-future-of-sharepoint-event/

    

This is what you will see once the issue is fixed