diff --git a/db/migrate/20250819101032_create_ai_quotas.rb b/db/migrate/20250819101032_create_ai_quotas.rb
index 500f00db9..6b4d9a4af 100644
--- a/db/migrate/20250819101032_create_ai_quotas.rb
+++ b/db/migrate/20250819101032_create_ai_quotas.rb
@@ -8,7 +8,5 @@ class CreateAiQuotas < ActiveRecord::Migration[8.1]
 
       t.timestamps
     end
-
-    add_index :ai_quotas, :user_id, unique: true
   end
 end