Oracle Solution for Error ora-38499

ORA-38499: expression set already configured for stored/indexed attributes

What triggered the Error:

The expression set already had a list of stored and indexed attributes. Additional attributes cannot be specified in the CREATE INDEX parameters clause.

What should we do to fix it:

Remove TOP, STOREATTRS and INDEXATTRS clauses from the parameters clause or clear the expression set statistics using DBMS_EXPFIL.INDEX_PARAMETERS API.