diff --git a/app/controllers/public/conference_feedbacks_controller.rb b/app/controllers/public/conference_feedbacks_controller.rb
index 9b76e83..e412f3b 100644
--- a/app/controllers/public/conference_feedbacks_controller.rb
+++ b/app/controllers/public/conference_feedbacks_controller.rb
@@ -4,7 +4,7 @@ class Public::ConferenceFeedbacksController < Public::ApplicationController
     @unrated_events = @conference.events
                         .joins(:proposition).approved
                         .joins('LEFT JOIN feedbacks ON feedbacks.feedback_receiving_id = events.id AND feedbacks.feedback_receiving_type = \'Event\'')
-                        .where('feedbacks.session_id != ? OR feedbacks.id IS NULL', session.id)
+                        .where('feedbacks.session_id != ? OR feedbacks.id IS NULL', session.id).distinct
 
     @rated_events = @conference.events
                       .joins(:proposition).approved