Environment: Windows, Oracle 10.1

On one of my databases, Job 26 from DBA_JOBS shows invalid Dates & Times and is throwing errors in the alert log every few minutes and sometimes choke the db. The db is up for about 2 years and is 50GB in size.

Tue Apr 17 09:57:47 2007
Errors in file d:\oracle\product\10g\admin\ops10g\bdump\ops10g_j000_3532.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-08102: index key not found, obj# 203, file 1, block 1490 (2)
ORA-12012: error on auto execute of job 26
ORA-08102: index key not found, obj# 203, file 1, block 1490 (2)

JOB: 26
LOG_USER: SYSMAN
LAST_DATE: 9/23/2006 10:31:50 AM
LAST_SEC: 10:31:50
THIS_DATE: 4/17/2007 11:13:42 AM
THIS_SEC: 11:13:42
NEXT_DATE: 9/23/2006 10:32:52 AM
NEXT_SEC: 10:32:52
INTERVAL: sysdate + 1 / (24 * 60)
FAILURES: 0
WHAT: EMD_MAINTENANCE.EXECUTE_EM_DBMS_JOB_PROCS();

See attached file too.

How can I have this fixed.

-D