Do not return duplicates with Spree::Property.sold_by

app/models/spree/property_decorator.rb

@@ -10,7 +10,8 @@ module Spree
       joins(products: {variants: {exchanges: :order_cycle}}).
         merge(Exchange.outgoing).
         merge(Exchange.to_enterprise(shop)).
-        merge(OrderCycle.active)
+        merge(OrderCycle.active).
+        select('DISTINCT spree_properties.*')
     }
 
     after_save :refresh_products_cache

spec/models/spree/property_spec.rb

@@ -68,6 +68,19 @@ module Spree
         it "doesn't return the property from a closed order cycle" do
           expect(Property.sold_by(shop)).not_to include property_closed_oc
         end
+
+        context "with another product in the order cycle" do
+          let!(:product2) { create(:simple_product) }
+          let!(:oc) { create(:simple_order_cycle, distributors: [shop], variants: [product.variants.first, product2.variants.first]) }
+
+          before do
+            product2.set_property 'Organic', 'NASAA 12345'
+          end
+
+          it "doesn't return duplicates" do
+            expect(Property.sold_by(shop).to_a.count).to eq 1
+          end
+        end
       end
     end