BUGFIX: Since #2700 it is not longer possible to inherit Accounts for…

… special usage

This will only ask Doctrine about objects, which are definitely marked as entity themself.

Neos.Flow/Classes/Persistence/Doctrine/PersistenceManager.php

@@ -12,6 +12,7 @@
  */
 
 use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Mapping\Entity;
 use Doctrine\ORM\ORMException;
 use Doctrine\ORM\Tools\SchemaTool;
 use Doctrine\ORM\Tools\ToolsException;
@@ -128,6 +129,21 @@ public function isNewObject($object): bool
         if (!$object instanceof PersistenceMagicInterface) {
             return true;
         }
+        // This filters for classes, which have inherited the PersistenceMagicInterface, but did not get annotated
+        // Such objects are by definition no persistable objects, so we should not let ask doctrine anything about them.
+        // Should probably get removed as soon as Accounts are usable without the base class carrying the entity
+        // annotation.
+        $annotations = \array_filter(
+            $this->reflectionService->getClassAnnotations(\get_class($object)),
+            static function ($annotation) {
+                return ($annotation instanceof Entity)
+                    || ($annotation instanceof Flow\Entity)
+                    || ($annotation instanceof Flow\ValueObject);
+            }
+        );
+        if (\count($annotations) === 0) {
+            return true;
+        }
 
         return ($this->entityManager->getUnitOfWork()->getEntityState($object) === UnitOfWork::STATE_NEW);
     }