diff --git a/db/migrate/20261004225000_add_room_id_and_created_at_index_to_messages.rb b/db/migrate/20261004225000_add_room_id_and_created_at_index_to_messages.rb
index a46b27b..b14c018 100644
--- a/db/migrate/20261004225000_add_room_id_and_created_at_index_to_messages.rb
+++ b/db/migrate/20261004225000_add_room_id_and_created_at_index_to_messages.rb
@@ -1,5 +1,5 @@
 class AddRoomIdAndCreatedAtIndexToMessages < ActiveRecord::Migration[8.2]
   def change
-    add_index :messages, %i[ room_id created_at ]
+    add_index :messages, %i[ room_id created_at ], if_not_exists: true
   end
 end