How to fix the Oracle error DRG-13015: sublexer string already exists in the index?

In this post, you’ll learn more about the Oracle ErrorDRG-13015: sublexer string already exists in the index with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

DRG-13015: sublexer string already exists in the index

Reason for the Error DRG-13015: sublexer string already exists in the index

Cause: cannot add a sub_lexer more than once

How to fix the Error DRG-13015: sublexer string already exists in the index ?

You can fix this error in Oracle by following the below steps

Action: if you want to update sub_lexer preferences, use update sub_lexer parameter or remove currently used sub_lexer