guardian code chnages

junior/serializers.py

@@ -503,6 +503,7 @@ class RemoveGuardianCodeSerializer(serializers.ModelSerializer):
         model = Junior
         fields = ('id', )
     def update(self, instance, validated_data):
+        instance.guardian_code = None
         instance.guardian_code_status = str(NUMBER['one'])
         instance.save()
         return instance