How to fix the Oracle error ORA-56926: database must be in UPGRADE mode in order to start an upgrade window?

In this post, you’ll learn more about the Oracle ErrorORA-56926: database must be in UPGRADE mode in order to start an upgrade window with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-56926: database must be in UPGRADE mode in order to start an upgrade window

Reason for the Error ORA-56926: database must be in UPGRADE mode in order to start an upgrade window

Database was not in UPGRADE mode.

How to fix the Error ORA-56926: database must be in UPGRADE mode in order to start an upgrade window ?

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

Restart database in UPGRADE mode.