diff --git a/lib/Service/ObjectService.php b/lib/Service/ObjectService.php
index 9a5e022f..e0befbbf 100644
--- a/lib/Service/ObjectService.php
+++ b/lib/Service/ObjectService.php
@@ -304,13 +304,13 @@ public function getAllObjects(string $objectType, ?int $limit = null, ?int $offs
 	 */
 	public function saveObject(string $objectType, array $object, bool $updateVersion = true): mixed
 	{
-		// Get the appropriate mapper for the object type
-		$mapper = $this->getMapper($objectType);
-
 		if ($objectType === 'publication') {
 			$object = $this->validationService->validatePublication($object);
 		}
 
+		// Get the appropriate mapper for the object type
+		$mapper = $this->getMapper($objectType);
+
 		// If the object has an id, update it; otherwise, create a new object
 		if (isset($object['id']) === true) {
 			return $mapper->updateFromArray($object['id'], $object, $updateVersion);
diff --git a/lib/Service/ValidationService.php b/lib/Service/ValidationService.php
index dc863d36..38371705 100644
--- a/lib/Service/ValidationService.php
+++ b/lib/Service/ValidationService.php
@@ -52,6 +52,10 @@ public function validatePublication(array $publication): array
 		$validator = new Validator();
 		$validator->setMaxErrors(100);
 
+		if(empty($publicationType->getProperties()) === true) {
+			return $publication;
+		}
+
 		$result = $validator->validate(data: (object) json_decode(json_encode($publication['data'])), schema:  $publicationType->getSchema($this->urlGenerator));
 
 		$publication['validation'] = [];