use RT::Report::Tickets;
my $tix = RT::Report::Tickets->new( $session{'CurrentUser'} );
-
+my %AllowedGroupings = reverse $tix->Groupings( Query => $Query );
+$PrimaryGroupBy = 'Queue' unless exists $AllowedGroupings{$PrimaryGroupBy};
my ($count_name, $value_name) = $tix->SetupGroupings(
Query => $Query, GroupBy => $PrimaryGroupBy,
);