unjournaled changes made; database may not be recoverable

  Explanation:  Changes have been made to the database  while  AIJ
  journaling  was disabled.  This may result in the database being
  unrecoverable in the event of database failure; that is, it  may
  be impossible to roll-forward the after-image journals, due to a
  transaction mis-match or attempts to modify  objects  that  were
  not journalled.

  User  Action:   IMMEDIATELY  perform  a  full  database  backup.
  Following successful completion of the full database backup, the
  after-image journals may be backed up.