How to fix the Oracle error ORA-16557: database is already in use?

In this post, you’ll learn more about the Oracle ErrorORA-16557: database is already in use with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-16557: database is already in use

Reason for the Error ORA-16557: database is already in use

An attempt was made to create a duplicate database in the broker configuration, or to add a duplicate instance (sid) for an existing database in the broker configuration.

How to fix the Error ORA-16557: database is already in use ?

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

Check the database to be added to ensure there are no duplicates.