DataBase Open Problem

Hi Gurus ,

I restored the online backup of our R3 server to different hardware with different file structure using brtools . But after restore the DB am not able to open the database . here with below i mentioned the error while starting the database .

SQL> startup

ORACLE instance started.

Total System Global Area 1627389952 bytes

Fixed Size 2004648 bytes

Variable Size 822085976 bytes

Database Buffers 788529152 bytes

Redo Buffers 14770176 bytes

Database mounted.

ORA-01589: must use RESETLOGS or NORESETLOGS option for database open

So kindly