ORA-39710
        database in upgrade or downgrade mode, only SYSDBA and SYSOPER connections are allowed
        
        
        Cause
        An attempt was made to connect to the database with a non-administrative connection type while the database was open for an upgrade or a downgrade operation.
        Action
        Only the SYSDBA and SYSOPER types of administrative connections are allowed during the database upgrade or downgrade mode. For non-administrative users, wait for the upgrade or downgrade operation to complete and try connecting again later.
        
     
    
    
        ORA-39710
        The database mode conflicts with the connection type.
        
        
        Cause
        An attempt was made to connect to a database when the database was open for upgrade or downgrade, but a conflicting type of connection was specified. Only the SYSDBA and SYSOPER types of administrative connection are allowed while the database is open in upgrade or downgrade mode.
        Action
        If you are not an administrative user, try to connect again after the database upgrade or downgrade is complete. If you are an administrative user, specify either the AS SYSDBA or the AS SYSOPER administrative connection type.
        
     
    
    
        ORA-39710
        The database mode conflicts with the connection type.
        
        
        Cause
        An attempt was made to connect to a database when the database was open for upgrade or downgrade, but a conflicting type of connection was specified. Only the SYSDBA and SYSOPER types of administrative connection are allowed while the database is open in upgrade or downgrade mode.
        Action
        If you are not an administrative user, try to connect again after the database upgrade or downgrade is complete. If you are an administrative user, specify either the AS SYSDBA or the AS SYSOPER administrative connection type.