SWITCHOVER VERIFY WARNING: switchover target has no standby database defined in LOG_ARCHIVE_DEST_n parameter.

When performing a switchover verificaton from your primary database, in your Data Guard setup, you may see the following:

sqlplus / as sysdba

SQL>  ALTER DATABASE SWITCHOVER TO stb verify;
 ALTER DATABASE SWITCHOVER TO stb verify
*
ERROR at line 1:
ORA-16475: succeeded with warnings, check alert log for more details

Alert log reports:
2022-12-06T09:56:34.020025+01:00
ALTER DATABASE SWITCHOVER TO stb verify
2022-12-06T09:56:34.192599+01:00
SWITCHOVER VERIFY: Send VERIFY request to switchover target STB
SWITCHOVER VERIFY WARNING: switchover target has no standby database defined in LOG_ARCHIVE_DEST_n parameter.
If the switchover target is converted to a primary database, the new primary database will not be protected.
ORA-16475 signalled during: ALTER DATABASE SWITCHOVER TO stb verify...

Solution:
Update the standby database log_archive_dest_n parameter, to prepare it for a future primary role.

In the standby database, update one of the log_archive_dest_n parameters, I picked the next available from the list, log_archive_dest_2:

alter system set log_archive_dest_2='service=primary.oric.no LGWR ASYNC VALID_FOR=(ONLINE_LOGFILE,PRIMARY_ROLE) DB_UNIQUE_NAME=primary';

Run the verification again:

SQL>  ALTER DATABASE SWITCHOVER TO stb verify;

Database altered.

Check the alert log and it will confirm that the database stb can now be turned into a primary database:

2022-12-06T10:03:34.605309+01:00
ALTER DATABASE SWITCHOVER TO stb verify
2022-12-06T10:03:34.773710+01:00
SWITCHOVER VERIFY: Send VERIFY request to switchover target STB
SWITCHOVER VERIFY COMPLETE: READY FOR SWITCHOVER
Completed: ALTER DATABASE SWITCHOVER TO stb verify