Fix PhpCR migration exception for unpublished languages (#698)

Co-authored-by: Christian Frantzen <[email protected]>

Author: Cephra

Diff for: Resources/phpcr-migrations/Version202407111600.php

@@ -88,6 +88,9 @@ private function upgrade(SessionInterface $session): void
             /** @var Row<mixed> $row */
             foreach ($rows as $row) {
                 $node = $row->getNode();
+                if (!$node->hasProperty($templateKey)) {
+                    continue;
+                }
                 $structureType = $node->getPropertyValue($templateKey);
                 $routePathPropertyName = $this->getRoutePathPropertyName($structureType, $locale);
 
@@ -113,6 +116,9 @@ private function downgrade(SessionInterface $session)
             foreach ($rows as $row) {
                 $node = $row->getNode();
                 $propertyName = $this->propertyEncoder->localizedContentName(RoutableSubscriber::ROUTE_FIELD_NAME, $locale);
+                if (!$node->hasProperty($propertyName)) {
+                    continue;
+                }
                 $node->setProperty($propertyName, null);
             }
         }