fix code in mission controller and form request

database/migrations/2026_06_21_120836_add_item_and_subitems_to_missions_table.php

@@ -23,7 +23,7 @@ return new class extends Migration
     public function down(): void
     {
         Schema::table('missions', function (Blueprint $table) {
-            //
+            $table->dropColumn('item_id', 'sub_item_id');
         });
     }
 };