diff --git a/.changes/unreleased/Fixed-20250203-112259.yaml b/.changes/unreleased/Fixed-20250203-112259.yaml
new file mode 100644
index 000000000..ca70043a7
--- /dev/null
+++ b/.changes/unreleased/Fixed-20250203-112259.yaml
@@ -0,0 +1,6 @@
+kind: Fixed
+body: Fix document category creation
+time: 2025-02-03T11:22:59.977168975+01:00
+custom:
+    Issue: "354"
+    SchemaChange: No schema change
diff --git a/src/Bundle/ChillDocStoreBundle/Controller/DocumentCategoryController.php b/src/Bundle/ChillDocStoreBundle/Controller/DocumentCategoryController.php
index e67ac9751..061ce5330 100644
--- a/src/Bundle/ChillDocStoreBundle/Controller/DocumentCategoryController.php
+++ b/src/Bundle/ChillDocStoreBundle/Controller/DocumentCategoryController.php
@@ -92,13 +92,14 @@ class DocumentCategoryController extends AbstractController
 
         $nextId = $em
             ->createQuery(
-                'SELECT MAX(c.idInsideBundle) + 1 FROM ChillDocStoreBundle:DocumentCategory c'
+                'SELECT (CASE WHEN MAX(c.idInsideBundle) IS NULL THEN 1 ELSE MAX(c.idInsideBundle) + 1 END)
+         FROM ChillDocStoreBundle:DocumentCategory c'
             )
-            ->getSingleResult();
+            ->getSingleScalarResult();
 
         $documentCategory = new DocumentCategory(
             ChillDocStoreBundle::class,
-            reset($nextId)
+            $nextId
         );
 
         $documentCategory