0x00720605 (7472645) The index definition references the IMS field, field-name, which is a primary-key sequence field that is defined in a DEDB, HDAM, or PHDAM database. This type of index definition is not supported.

Explanation

Index definitions are not supported for a table that references a DEDB database. When you define an index for a table that references a HDAM or PHDAM database, you can define an index that references a secondary index XDFLD definition only.