index mapping applies to BYTE, WORD and LONGWORD fields only

  Explanation:  You attempted to remap index values but the fields
  must  be  of  a SIGNED BYTE (TINYINT), SIGNED WORD (SMALLINT) or
  SIGNED LONGWORD (INTEGER) data type.

  User Action:  Review the command you typed, and issue  it  again
  specifying a column of the appropriate data type.