diff --git a/.github/workflows/phpunit-sqlite.yml b/.github/workflows/phpunit-sqlite.yml
index 58422b618..8c02e647d 100644
--- a/.github/workflows/phpunit-sqlite.yml
+++ b/.github/workflows/phpunit-sqlite.yml
@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         php-versions: ['7.4', '8.0', '8.1']
-        server-versions: ['master']
+        server-versions: ['stable25']
 
     steps:
       - name: Set app env
diff --git a/lib/Controller/PreviewController.php b/lib/Controller/PreviewController.php
index 2ad4e91ad..c19ea36e0 100644
--- a/lib/Controller/PreviewController.php
+++ b/lib/Controller/PreviewController.php
@@ -101,7 +101,7 @@ public function index(
 
 		if (\count($nodes) === 0) {
 			$receivedAlbums = $this->albumMapper->getAlbumsForCollaboratorIdAndFileId($user->getUID(), AlbumMapper::TYPE_USER, $fileId);
-			$receivedAlbums = array_udiff($receivedAlbums, $checkedAlbums, fn ($a, $b) => strcmp($a->getId(), $b->getId()));
+			$receivedAlbums = array_udiff($receivedAlbums, $checkedAlbums, fn ($a, $b) => ($a->getId() - $b->getId()));
 			$nodes = $this->getFileIdForAlbums($fileId, $receivedAlbums);
 			$checkedAlbums = array_merge($checkedAlbums, $receivedAlbums);
 		}
@@ -110,7 +110,7 @@ public function index(
 			$userGroups = $this->groupManager->getUserGroupIds($user);
 			foreach ($userGroups as $groupId) {
 				$albumsForGroup = $this->albumMapper->getAlbumsForCollaboratorIdAndFileId($groupId, AlbumMapper::TYPE_GROUP, $fileId);
-				$albumsForGroup = array_udiff($albumsForGroup, $checkedAlbums, fn ($a, $b) => strcmp($a->getId(), $b->getId()));
+				$albumsForGroup = array_udiff($albumsForGroup, $checkedAlbums, fn ($a, $b) => ($a->getId() - $b->getId()));
 				$nodes = $this->getFileIdForAlbums($fileId, $albumsForGroup);
 				$checkedAlbums = array_merge($checkedAlbums, $receivedAlbums);
 				if (\count($nodes) !== 0) {