Mission server side dependencies

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

The remedy link provided by SharePoint below does not give me a solution:

For more information about this rule, see "http://go.microsoft.com/fwlink/?LinkID=142689".

Does anyone know how to correct this error?

Thanks,

Brian.