While running a repair on Workflow Solution with the Workflow MSI, it said that it finished successfully but there was an error message saying:
"Database integration strategy failed due to an error: The operation cannot be performed on database "ProcessManager" because it is involved in a database mirroring session or an availability group."
Workflow Solution 8.6, 8.7
The ProcessManager database is being mirrored to another SQL server for disaster recovery purposes. The database was configured to be in a high availability setup.
Disable the mirroring or high availability for this server so that a repair can be performed. Once the repair is completed it can be reenable.