root dbkey of b-tree partition in <str> is <num>:<num>:<num>

  Explanation:  An  error  occurred  at  a  lower  level  in  this
  partition  of  the  b-tree.   This  error message gives the root
  dbkey of this partition of the b-tree index  to  help  determine
  the point of corruption.

  User Action:  Use this information to reconstruct the path  from
  the  root  to  the node where the problem occurred and determine
  the location of the problem.  Rebuild the index and  verify  the
  database again.