diff --git a/lib/Service/Importer/Systems/DeckJsonService.php b/lib/Service/Importer/Systems/DeckJsonService.php
index 0fcef4ba0..10159b15b 100644
--- a/lib/Service/Importer/Systems/DeckJsonService.php
+++ b/lib/Service/Importer/Systems/DeckJsonService.php
@@ -78,7 +78,9 @@ class DeckJsonService extends ABoardImportService {
 
 	public function mapMember($uid): ?string {
 		$ownerMap = $this->mapOwner($uid);
-		if ($uid === $this->getImportService()->getData()->owner && $ownerMap !== $this->getImportService()->getData()->owner) {
+		$sourceId = ($this->getImportService()->getData()->owner->primaryKey ?? $this->getImportService()->getData()->owner);
+
+		if ($uid === $sourceId && $ownerMap !== $sourceId) {
 			return $ownerMap;
 		}