diff --git a/db/schema.rb b/db/schema.rb
index 41f918a..0d0b529 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -21,6 +21,7 @@
     t.integer "list_seq"
     t.datetime "published_at", precision: nil
     t.index ["body"], name: "index_messages_on_body"
+    t.index ["list_id", "list_seq"], name: "index_messages_on_list_id_and_list_seq", unique: true
   end
 
 end