AIJ backup completed after skipping previously backed up journal
  sequence <num>

  Explanation:  An attempt was made to back up an after-image
  journal that does not have the next chronological sequence
  number.  This condition normally occurs when a "by-sequence"
  operation is done out of order.  For instance, sequence 6 is
  backed up, then sequences 5 through 7 are attempted.

  User Action:  In the above example, the backup was completed
  when the previously backed up AIJ sequence  6 was encountered.
  The journal containing sequence  5 was fully and safely backed
  up.  Restart the backup with the next journal requiring back up
  (in the above example, sequence  7).