Getting session logger error all of sudden

Hi,
I am getting following error on my server log. I did not make any changes to my server and it started few days back and keep on coming. Due to this server went very slow.

ERROR:

[WmAuditingSC.logger.3405E] In logger ‘Session Logger’, failed to log to destination; reason: Transient SQLException detected
2016-02-29 10:53:54 AST [WmAuditingSC.destination.1122E] Destination ‘SessionDBDest’ caught unexpected Throwable logging audit event: [SoftwareAG][Oracle JDBC Driver][Oracle]ORA-00600: internal error code, arguments: [6122], [0], [1], [0], [], [], [], [], [], [], [], []

Any help or any pointer would be much appreciated.

HI All,
I am able to sort this error.
It was because table index got corrupted. Even rebuild did not work. So need to delete tablesapce and recreate it.