AIJ modify operation not allowed; AIJ backup in progress

  Explanation:  An AIJ backup is currently in progress.  While  an
  AIJ  backup  is  in  progress,  AIJ  modify operations (such as,
  disabling AIJ journaling or changing the default  AIJ  filename)
  are not permitted.  If the AIJ backup was prematurely terminated
  by the  user,  another  AIJ  backup  must  complete  before  AIJ
  modifications are permitted.

  User Action:  Allow the AIJ backup to finish  before  attempting
  the  AIJ  modify  operation.   If the AIJ backup was prematurely
  terminated by the user, start another AIJ backup and allow it to
  complete.  The AIJ modify operation will then be possible.