Oracle Solution for Error ora-39700

Solution for Oracle Error ORA-39700

ORA-39700: database must be opened with UPGRADE option

What triggered the Error:

A normal database open was attempted, but the database has not been upgraded to the current server version.

What should we do to fix it:

Use the UPGRADE option when opening the database to run catupgrd.sql (for database upgrade), or to run catalog.sql and catproc.sql (after initial database creation).