Getting error message when opening report server home page ( found 163 but 162 needed) I just uninstalled SQL Server reporting services native and installed back again from same media which we used 3 years ago. This version is free one (development use only). I configured the report server but am now getting following message.


  The version of the report server database is either in a format that is not valid, or it cannot be read. The found version is '163'. The expected version is '162'. (rsInvalidReportServerDatabase) 


Here is the current version of SQL Server info.

Microsoft SQL Server 2012 (SP3-GDR) (KB3194721) - 11.0.6248.0 (X64) 
    Copyright (c) Microsoft Corporation
    Developer Edition (64-bit) on Windows NT 6.3 &lt;X64&gt; (Build 9600: ) (Hypervisor)


Please help how to resolve this.
Talked through with the Asker in chat but in essence:

Database Engine (SP3) and Reporting Services (RTM) are now installed on the same server but experiencing incompatibility since the "naïve" Reporting Services (installed from a RTM media - overwriting the now-uninstalled updated version) is seeing a more recent (updated) Database Engine ReportServerDB version than it can handle. Database Engine has been upgraded since the original install (via Windows Update or whatever applies to that environment) to SP3 but RS has now been reset to "naïve" RTM version.

Update the installed Reporting Services with SP3 and any CUs to match the installed Database Engine version, restart and re-try. There may be some downtime for users depending on whether it requires a restart so advise/schedule that accordingly.