diff --git a/Controller/ApiDriverAttributeController.php b/Controller/ApiDriverAttributeController.php
index 959bd56..0831e78 100644
--- a/Controller/ApiDriverAttributeController.php
+++ b/Controller/ApiDriverAttributeController.php
@@ -231,7 +231,9 @@ final class ApiDriverAttributeController extends Controller
 
         $this->updateModel($request->header->account, $old, $new, DriverAttributeMapper::class, 'driver_attribute', $request->getOrigin());
 
-        if ($new->value->getValue() !== $old->value->getValue()) {
+        if ($new->value->getValue() !== $old->value->getValue()
+            && $new->type->custom
+        ) {
             $this->updateModel($request->header->account, $old->value, $new->value, DriverAttributeValueMapper::class, 'attribute_value', $request->getOrigin());
         }
 
diff --git a/Controller/ApiVehicleAttributeController.php b/Controller/ApiVehicleAttributeController.php
index d8871c7..1046c5b 100644
--- a/Controller/ApiVehicleAttributeController.php
+++ b/Controller/ApiVehicleAttributeController.php
@@ -231,7 +231,9 @@ final class ApiVehicleAttributeController extends Controller
 
         $this->updateModel($request->header->account, $old, $new, VehicleAttributeMapper::class, 'vehicle_attribute', $request->getOrigin());
 
-        if ($new->value->getValue() !== $old->value->getValue()) {
+        if ($new->value->getValue() !== $old->value->getValue()
+            && $new->type->custom
+        ) {
             $this->updateModel($request->header->account, $old->value, $new->value, VehicleAttributeValueMapper::class, 'attribute_value', $request->getOrigin());
         }