ORA-01665
        control file is not a standby control file
        
        
        Cause
        An attempt was made to mount, recover, or activate either a standby multitenant container database (CDB) without a standby control file, or a pluggable database (PDB) that was not created as an Oracle Data Guard standby database.
        Action
        When the error is raised for an action against a CDB, create a standby control file before using the CDB as a standby database. When the error is raised for an action against a PDB, check and correct the PDB context so that it is only used against a PDB created as a standby database.
        
     
    
    
        ORA-01665
        control file is not a standby control file
        
        
        Cause
        An attempt was made to mount, recover, or activate either a standby multitenant container database (CDB) without a standby control file, or a pluggable database (PDB) that was not created as an Oracle Data Guard standby database.
        Action
        When the error is raised for an action against a CDB, create a standby control file before using the CDB as a standby database. When the error is raised for an action against a PDB, check and correct the PDB context so that it is only used against a PDB created as a standby database.
        
     
    
    
        ORA-01665
        control file is not a standby control file
        
        
        Cause
        Attempting to mount, recover or activate a standby database without a standby control file.
        Action
        Create a standby control file before attempting to use the database as a standby database.