diff --git a/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/LightLevel.java b/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/LightLevel.java
index 11188111..a226ed77 100644
--- a/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/LightLevel.java
+++ b/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/LightLevel.java
@@ -5,7 +5,7 @@
 import io.reactivex.rxjava3.subjects.Subject;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import lombok.Setter;
+import lombok.ToString;
 import lombok.extern.slf4j.Slf4j;
 
 @Data
@@ -17,7 +17,8 @@ public class LightLevel extends Sensor<LightLevel> {
   private final Subject<Integer> lightLevel$ = ReplaySubject.createWithSize(1);
   private final Subject<Boolean> dayLight$ = ReplaySubject.createWithSize(1);
 
-  @Setter
+  @EqualsAndHashCode.Exclude
+  @ToString.Exclude
   private MotionSensor motionSensor;
 
   @Override
diff --git a/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/MotionSensor.java b/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/MotionSensor.java
index 0b784621..3d1afa81 100644
--- a/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/MotionSensor.java
+++ b/backend/src/main/java/ch/akop/homesystem/models/devices/sensor/MotionSensor.java
@@ -5,6 +5,7 @@
 import io.reactivex.rxjava3.subjects.Subject;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
+import lombok.ToString;
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
@@ -17,6 +18,8 @@ public class MotionSensor extends Sensor<MotionSensor> {
   private final Subject<Integer> targetDistance$ = ReplaySubject.createWithSize(1);
   private final boolean offersDistance;
 
+  @EqualsAndHashCode.Exclude
+  @ToString.Exclude
   private LightLevel lightLevel;
 
   @Override