index of TYPE HASHED must be stored in area(s) with PAGES MIXED

  Explanation:  You attempted to  define  a  hashed  index  to  be
  stored  in  a storage area with a uniform-page format.  A hashed
  index must be stored in a storage area with a mixed-page format.

  User Action:  Specify one or more storage areas with  mixed-page
  format for the hashed index.