The feature “Scale out deployment” is not available in this edition of Reporting Services
When you migrate your SSRS installation to a new host or instance, additional records can get added to [dbo].keys in the ReportingServices database. This is the source of the error. Assuming you do not intend to use scale-out RS– in which case, you need to check the Edition you are installing– the solution is to delete all but the newest record. Keep reading…