AIJ backup not possible when modified journals have been
  overwritten

  Explanation:  An attempt was made to perform an after-image
  backup when one or more of the active AIJ journals have been
  overwritten.  Backing up an AIJ journal that has been
  overwritten is not possible, because AIJ data was lost when the
  journal was overwritten, making the database non-recoverable.
  The resulting AIJ backup file could not be used for subsequent
  AIJ roll-forward operations.

  User Action:  Perform a full database backup.  Once the full
  database backup has been completed, after-image journal backup
  operations will again be possible.