core/modules/rest/src/Plugin/rest/resource/EntityResource.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
index 1087468..3d3072d 100644
--- a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
+++ b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
@@ -244,10 +244,12 @@ public function patch(EntityInterface $original_entity, EntityInterface $entity
       // Check access for all received fields, but only if they are being
       // changed. The bundle of an entity, for example, must be provided for
       // denormalization to succeed, but it may not be changed.
-      elseif (!$original_field->equals($field) && !$original_field->access('edit')) {
-        throw new AccessDeniedHttpException("Access denied on updating field '$field_name'.");
+      elseif (!$original_field->equals($field)) {
+        if (!$original_field->access('edit')) {
+          throw new AccessDeniedHttpException("Access denied on updating field '$field_name'.");
+        }
+        $original_entity->set($field_name, $field->getValue());
       }
-      $original_entity->set($field_name, $field->getValue());
     }
 
     // Validate the received data before saving.