oracle error- ORA-00392: log string of thread string is being cleared, operation not allowed

Oracle error

ORA-00392:	log string of thread string is being cleared, operation not allowed
Cause:	An operation encountered this online log in the middle of being cleared. The command that began the clearing may have terminated without completing the clearing.
Action:	If the clear command is still executing then wait for its completion. If it terminated then reissue the clear command, or drop the log.

oracle error- ORA-00391: All threads must switch to new log format at the same time

Oracle error

ORA-00391:	All threads must switch to new log format at the same time
Cause:	An attempt to switch the current log of a single thread is not allowed because the compatiblity requirements force a new log format version number. When changing log formats, all threads must switch to the new format at the same time.
Action:	Open the database to cause the coordinated log switch. If that is not possible then return to the same software version and compatibility setting last used to open the database.

oracle error- ORA-00390: log string of thread string is being cleared, cannot become current log

Oracle error

ORA-00390:	log string of thread string is being cleared, cannot become current log
Cause:	An attempt to switch to a new online log for the redo thread failed because no reusable log could be found. This log is being cleared and will be useable when the clearing completes. The command that began the clearing may have terminated without completing the clearing.
Action:	If the clear command is still executing then wait for its completion. If it terminated then reissue the clear command, or drop the log.