column name "<str>" appears more than once in this  table,  view
  or map

  Explanation:  The column name appears more than  once  within  a
  table, view or storage map (COLUMNS clause) definition.

  User Action:  For a table or view the column name  can  only  be
  used  once.   Therefore, remove or change the name of the column
  to avoid this problem.  For a storage map the  column  name  may
  only be used in one COLUMNS clause.  You may not map a column to
  more than one vertical partition.