diff --git a/src/Service/RDAPService.php b/src/Service/RDAPService.php
index 2e57f8c..20a25a3 100644
--- a/src/Service/RDAPService.php
+++ b/src/Service/RDAPService.php
@@ -389,7 +389,9 @@ class RDAPService
     {
         $now = new \DateTimeImmutable();
         foreach ($domain->getDomainEntities()->getIterator() as $domainEntity) {
-            $domainEntity->setDeletedAt($now);
+            if (null !== $domainEntity->getDeletedAt()) {
+                $domainEntity->setDeletedAt($now);
+            }
         }
 
         if (!isset($rdapData['entities']) || !is_array($rdapData['entities'])) {