Upgrade Fails - Service Broker can not be enabled

The Service Broker in database "ForayAdams" cannot be enabled because there is already an enabled Service Broker with the same ID.
ALTER DATABASE statement failed.

An upgrade (at v7.6) fails with a message similar to the one above.

This errors occurs when a database gets two service brokers, one enabled and one disabled. One way this can occur is due to a restore.

To fix this run the following SQL.

USE [master]
GO
ALTER DATABASE [ForayAdams] SET NEW_BROKER
GO

This statement will:

Enables Service Broker for the database
Assigns the new Service Broker identifier to the database
Clears any existing messages from the Service Broker queue for this database

You can then re-run the upgrade.