New Post: Removed servers still showing up on report

I have a cleanupscript which I run daily to fix this kind of issues. In order to remove data from removed servers, run this:

delete
from [policy].[PolicyHistory]
where evaluatedServer not in 
(
    SELECT server_name
    FROM [policy].[pfn_ServerGroupInstances]('')
)

NOTE: policyhistorydetail will be deleted automatically because of a foreign key constraint. This may generate a lot of logging at first run.
Make sure you delete the errorhistory also:

delete
from [policy].[EvaluationErrorHistory]
where evaluatedServer not in 
(
    SELECT server_name
    FROM [policy].[pfn_ServerGroupInstances]('')

)