diff --git a/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java b/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
index 5951034..7177887 100644
--- a/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
+++ b/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
@@ -218,6 +218,10 @@ public class Controller {
 
       Station aktuelleStation = bearbeitet.getAktuelleStation();
 
+      if(!cache.getStationen().contains(station)) {
+        return ResponseEntity.status(400).body("The scanned station isnt a part of the cache");
+      }
+
       int i = 0;
       for (Station station1 : cache.getStationen()) {
         if (station1.equals(station)) {