Oracle Solution for Error ora-16053

ORA-16053: DB_UNIQUE_NAME string is not in the Data Guard Configuration

What triggered the Error:

The specified DB_UNIQUE_NAME is not in the Data Guard Configuration.

What should we do to fix it:

If the DG_CONFIG attribute of the LOG_ARCHIVE_CONFIG parameter is enabled, you must specify a valid DB_UNIQUE_NAME. The list of valid DB_UNIQUE_NAMEs can be seen with the V$DATAGUARD_CONFIG view. This problem can also occur when specifying a non-standby destination with an DB_UNIQUE_NAME attribute that does not match the DB_UNIQUE_NAME initialization parameter for the current instance.