#399

backend/app/services/post_creator.rb

@@ -33,6 +33,9 @@ class PostCreator
       PostVersionRecorder.record!(post:, event_type: :create, created_by_user: @actor)
     end
     post
+  rescue StandardError
+    post&.thumbnail&.purge if post&.thumbnail&.attached?
+    raise
   end
 
   private