diff --git a/backend/src/routes/admin.js b/backend/src/routes/admin.js
index f4329c3..38ea942 100644
--- a/backend/src/routes/admin.js
+++ b/backend/src/routes/admin.js
@@ -3,7 +3,8 @@ const router = express.Router();
 const DeletionLogRepository = require('../repositories/DeletionLogRepository');
 const GroupCleanupService = require('../services/GroupCleanupService');
 
-const cleanupService = new GroupCleanupService();
+// GroupCleanupService ist bereits eine Instanz, keine Klasse
+const cleanupService = GroupCleanupService;
 
 // Hole Deletion Log (mit Limit)
 router.get('/deletion-log', async (req, res) => {