diff --git a/db/migrate/20251017161507_add_index_messages_message_id_header.rb b/db/migrate/20251017161507_add_index_messages_message_id_header.rb
deleted file mode 100644
index b92d7d6..0000000
--- a/db/migrate/20251017161507_add_index_messages_message_id_header.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-class AddIndexMessagesMessageIdHeader < ActiveRecord::Migration[8.0]
-  def change
-  end
-end
diff --git a/db/migrate/20251022024234_add_index_to_messages.rb b/db/migrate/20251022024234_add_index_to_messages.rb
new file mode 100644
index 0000000..de00a40
--- /dev/null
+++ b/db/migrate/20251022024234_add_index_to_messages.rb
@@ -0,0 +1,5 @@
+class AddIndexToMessages < ActiveRecord::Migration[8.0]
+  def change
+    add_index :messages, :message_id_header
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 43477c3..fe9c61d 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_10_17_161507) do
+ActiveRecord::Schema[8.0].define(version: 2025_10_22_024234) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
   enable_extension "pg_trgm"
@@ -65,6 +65,7 @@
     t.text "html_body"
     t.index ["body"], name: "index_messages_on_body", opclass: :gin_trgm_ops, using: :gin
     t.index ["list_id", "list_seq"], name: "index_messages_on_list_id_and_list_seq", unique: true
+    t.index ["message_id_header"], name: "index_messages_on_message_id_header"
   end
 
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"