full database backup should be done to ensure future recovery

  Explanation:   After  enabling  AIJ  journaling,  it  is   often
  necessary  to  perform  a  full (i.e., not incremental) database
  backup.  Failure to backup the database may result  in  the  AIJ
  file NOT being recoverable.

  User Action:  IT IS HIGHLY  RECOMMENDED  that  a  full  database
  backup be performed AS SOON AS POSSIBLE.