oracle error - ORA-00235: control file fixed table inconsistent due to concurrent update

ORA-00235:

control file fixed table inconsistent due to concurrent update
Cause: Concurrent update activity on a control file caused a query on a control file fixed table to read inconsistent information.
Action: Retry the operation.

oracle error - ORA-00234: error in identifying or opening snapshot or copy control file

ORA-00234:

error in identifying or opening snapshot or copy control file
Cause: A snapshot or copy control file of the specified name could not be found or opened during an invocation of cfileUseSnapshot, cfileMakeAndUseSnapshot, or cfileUseCopy.
Action: Re-create the snapshot or copy control file using cfileMakeAndUseSnapshot or ALTER DATABASE BACKUP CONTROLFILE, respectively.

oracle error - ORA-00233: copy control file is corrupt or unreadable

ORA-00233:

copy control file is corrupt or unreadable
Cause: The specified copy control file was found to be corrupt or unreadable during an invocation of cfileUseCopy.
Action: Before retrying cfileUseCopy, use the ALTER DATABASE BACKUP CONTROLFILE command and specify the same filename that was specified for cfileUseCopy.