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.