Crystal will not suppress duplicate subreport

I am working in Crystal 8.5 and have a subreport in my main report (I am
modifying the SO Pick List to include subcomponent part numbers from the
BOM). When I edit the format of the subreport and click the
suppress if duplicate checkbox, the next time I go to edit the subreport
format it is unchecked again. What would make the report not suppress
duplicate subreports?

Thanks,
Dianna


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