upgrade test (Test-SPContentDatabase) - reporting services error

While Running the PowerShell command for upgrade test (Test-SPContentDatabase), it shows following error....

Category        : MissingWebPart
Error           : True
UpgradeBlocking : False
Message         : WebPart class [ab6d9dad-e23c-ce4f-ff98-f6575a1ccf4c] (class [
                  Microsoft.ReportingServices.SharePoint.UI.WebParts.ReportView
                  erWebPart] from assembly 
                  [Microsoft.ReportingServices.SharePoint.UI.WebParts, 
                  Version=10.0.0.0, Culture=neutral, 
                  PublicKeyToken=89845dcd8080cc91]) is referenced [1] times in 
                  the database [Content Database], but is not installed 
                  on the current farm. Please install any feature/solution 
                  which contains this web part.
Remedy          : One or more web parts are referenced in the database 
                  [Content Database], but are not installed on the 
                  current farm. Please install any feature or solution which 
                  contains these web parts.
Locations       : 

I have following -

SharePoint 2013 environment with 1 WFE and 1 App Server with Mar 2013 + Aug 2013 patch update.

SQL server 2012 SP 1 reporting services components are successfully installed on both servers and SQL Server reporting Services - Service is in running state on both the servers..

Any idea what could be the issue ?

Thanks