Oracle Solution for Error ora-16808

Solution for Oracle Error ORA-16808

ORA-16808: primary database is not open

What triggered the Error:

A prior attempt to open the primary database was disallowed because the fast-start failover status could not be evaluated. The fast-start failover status has since been evaluated and the database can now be opened.

What should we do to fix it:

Open the database by issuing the SQL*Plus ALTER DATABASE OPEN command.