How to fix the Oracle error ORA-23666: Default column group in use by DML conflict handler “string”?

In this post, you’ll learn more about the Oracle ErrorORA-23666: Default column group in use by DML conflict handler “string” with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-23666: Default column group in use by DML conflict handler “string”

Reason for the Error ORA-23666: Default column group in use by DML conflict handler “string”

A default column group was found for the specified Apply name, operation name, and conflict type.

How to fix the Error ORA-23666: Default column group in use by DML conflict handler “string” ?

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

Remove the existing default column group and retry.