diff --git a/db/migrate/20210926205448_add_uniqueness.rb b/db/migrate/20210926205448_add_uniqueness.rb
new file mode 100644
index 00000000..7399ba4c
--- /dev/null
+++ b/db/migrate/20210926205448_add_uniqueness.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+# Agrega índices únicos que pensábamos que ya existían.
+class AddUniqueness < ActiveRecord::Migration[6.1]
+  def change
+    add_index :designs, :name, unique: true
+    add_index :designs, :gem, unique: true
+    add_index :licencias, :name, unique: true
+  end
+end