diff --git a/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java b/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java
index 9987e1d6..cb7ac06b 100644
--- a/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java
+++ b/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java
@@ -308,6 +308,8 @@ public class OpenScale {
 	}
 
 	public void clearScaleData(int userId) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        prefs.edit().putInt("uniqueNumber", 0x00).commit();
 		scaleDB.clearScaleData(userId);
 
         updateScaleData();