Dbkey of owner of this duplicate node is <num>:<num>:<num>

  Explanation:  There is an error with  a  duplicate  node.   This
  message  gives  the dbkey of the owner of the duplicate node, so
  that the integrity of the index can  be  verified  manually,  if
  necessary.

  User Action:  Ascertain if the  index  is  corrupt  by  manually
  verifying  the  owner node after dumping that page.  Rebuild the
  index if it is corrupt.