ORA-00600: internal error code, arguments: [13013], [5001], [121347], [12771893], [1], [12771893], [17]. Non-fatal internal error happenned while SMON was doing logging scn->time mapping.

Error: ORA-00600: internal error code, arguments: [13013], [5001], [121347], [12771893], [1], [12771893], [17], [], [], [], [], []. Non-fatal internal error happenned while SMON was doing logging scn->time mapping.

Details: Error occurred in the alert log

Cause: Occurs when smon_scn_time has been corrupted

Solution:. We have 2 choices here

1. Restore and recover the system tablespace
or
2. Recreate smon_scn_time

More on the solution here