diff --git a/database/migrations/2021_12_30_184109_add_inviter_id_index_to_user_infos_table.php b/database/migrations/2021_12_30_184109_add_inviter_id_index_to_user_infos_table.php
deleted file mode 100644
index c91e8ed8..00000000
--- a/database/migrations/2021_12_30_184109_add_inviter_id_index_to_user_infos_table.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
-use Illuminate\Support\Facades\Schema;
-
-class AddInviterIdIndexToUserInfosTable extends Migration
-{
-    /**
-     * Run the migrations.
-     *
-     * @return void
-     */
-    public function up()
-    {
-        Schema::table('user_infos', function (Blueprint $table) {
-            $table->index('inviter_id');
-        });
-    }
-
-    /**
-     * Reverse the migrations.
-     *
-     * @return void
-     */
-    public function down()
-    {
-        Schema::table('user_infos', function (Blueprint $table) {
-            $table->dropIndex(['inviter_id']);
-        });
-    }
-}