diff --git a/core/apps/wherehouse/serializers/wherehouse.py b/core/apps/wherehouse/serializers/wherehouse.py
index caafe1d..b01ef0f 100644
--- a/core/apps/wherehouse/serializers/wherehouse.py
+++ b/core/apps/wherehouse/serializers/wherehouse.py
@@ -56,6 +56,7 @@ class WhereHouseUpdateSerializer(serializers.ModelSerializer):
 
         users = validated_data.pop('users', None)
         if users is not None:
+            instance.users.clear()
             instance.users.set(users)
         instance.save()
         return instance