Event ID - 21152

Event Id21152
SourceISA Server NNTP Filter
DescriptionISA Server report or summary generation error: The daily summaries needed for generating reports and summaries were generated with a previous version of the product. Please use the source location %1 to report the failure.
Event Information According to Microsoft :
CAUSE :
All summary files needed to generate the report were generated with a previous version of the product

SOLUTION :
Delete these log summary files and then try to generate the report
Reference LinksEvent ID: 21152 Of Source ID: ISA Server NNTP Filter

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