The following is the ORA-00222 error message, you can learn the cause and solution of the Oralce error.
ORA-00222 operation would reuse name of a currently mounted controlfile
Cause: The file name supplied as a parameter to the ALTER DATABASE BACKUP CONTROLFILE command or to cfileSetSnapshotName matches the name of the specified currently mounted control file.
Solution: Retry the operation with a different file name.
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