app/controllers/affinities_controller.rb

@@ -26,7 +26,7 @@ class AffinitiesController < ApplicationController
       }
     end
 
-    GroupAffinity.upsert_all(affinities, unique_by: :uindex_group_pair)
+    GroupAffinity.upsert_all(affinities)
 
     render json: {}, status: :ok
   rescue ActiveRecord::InvalidForeignKey
@@ -50,7 +50,7 @@ class AffinitiesController < ApplicationController
       }
     end
 
-    GroupAffinity.upsert_all(affinities, unique_by: :uindex_group_pair)
+    GroupAffinity.upsert_all(affinities)
 
     render json: {}, status: :ok
   end