is an invalid database. The database exists on SQL server '{1}' but it is not a Microsoft Project Server 2013 database. If ...

'{0}' is an invalid database. The database exists on SQL server '{1}' but it is not a Microsoft Project Server 2013  database. If this is a Microsoft Project Server 2010 database, use the ConvertTo-SPProjectDatabase command to consolidate the Microsoft Project Server 2010 databases into a single Microsoft Project Server 2013  database and re-run this command using the consolidated database name.