ORA-19698 File is from different database

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I came across this error during point in time recovery of  500G database .

Steps followed to resolve the issue 

If the error "ORA-19698: %s is from different database" is seen during an Oracle disaster recovery operation, perform the following:
1. Bring the database to nomount state (Steps mentioned below):
At a command prompt, type the following command: SQLplus / as SYSDBA
shutdown immediate;
startup nomount;
2. Empty the contents of the directory (under the oradata directory) containing the data files and online redo logs of the newly created database.
3. Re-try the control file restore operation.

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