How to fix the Oracle error ORA-31504: cannot alter or drop predefined change source?

In this post, you’ll learn more about the Oracle ErrorORA-31504: cannot alter or drop predefined change source with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-31504: cannot alter or drop predefined change source

Reason for the Error ORA-31504: cannot alter or drop predefined change source

The caller attempted to alter or drop one of the predefined change sources HOTLOG_SOURCE or SYNC_SOURCE.

How to fix the Error ORA-31504: cannot alter or drop predefined change source ?

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

Do not attempt to alter or drop a predefined change source or correct call to supply the name of a user-created change source.