diff --git a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/TrackedRaceImpl.java b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/TrackedRaceImpl.java
index 32d38f3f2e4..c24e0c2cd94 100755
--- a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/TrackedRaceImpl.java
+++ b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/TrackedRaceImpl.java
@@ -805,7 +805,7 @@ public abstract class TrackedRaceImpl extends TrackedRaceWithWindEssentials impl
     /**
      * Monitor object to synchronize access to the {@link #updateStartAndEndOfTracking(boolean)} method. See bug 3922.
      */
-    private final Serializable updateStartAndEndOfTrackingMonitor = "updateStartAndEndOfTrackingMonitor";
+    private final Serializable updateStartAndEndOfTrackingMonitor = ""+new Random().nextDouble();
     
     /**
      * Updates the start and end of tracking in the following precedence order: