"No User exists with role Administrator" error seen when upgrading Liferay

Issue

• "No User exists with role Administrator" error is seen when upgrading major Liferay versions, as follows:

ERROR [main][VerifyProcessTrackerOSGiCommands:323] null
com.liferay.portal.verify.VerifyException: com.liferay.portal.kernel.exception.NoSuchUserException: No user exists in company 12345 with role Administrator

Environment

• DXP 7.4, DXP 7.3, DXP 7.2

Resolution

• It is required that at least one user has the Administrator role before performing the upgrade. 
• If the Liferay install has virtual instances, there must be at least one Administrator user per virtual instances.

Additional Information

• Liferay Upgrade Basics
• Liferay Migrating Configurations and Properties