FILID entry <num> is a  snapshot  area  whose  live  area  is  a
  snapshot area.

  Explanation:  The FILID entry for each snapshot area contains  a
  pointer to the FILID entry for the live area associated with the
  snapshot area.  The live area associated with the named snapshot
  area is not a live area.

  User Action:  Restore and recover the database from backup.