diff --git a/Web/app.py b/Web/app.py
index 8a61405..141a370 100755
--- a/Web/app.py
+++ b/Web/app.py
@@ -289,7 +289,7 @@ SCHEDULER_INTERVAL = cfg.SCHEDULER_INTERVAL_MIN
 SSL_CERT = cfg.SSL_CERT
 SSL_KEY = cfg.SSL_KEY
 
-LIBRARY_ITEM_TYPES = ('book', 'cd', 'dvd', 'other', 'schoolbook', 'Buch', 'Schulbuch', 'schulbuch')
+LIBRARY_ITEM_TYPES = ('book', 'cd', 'dvd', 'schoolbook', 'Buch', 'Schulbuch', 'schulbuch')
 INVOICE_CURRENCY = 'EUR'
 
 NOTIFICATION_STATUS_CACHE_TTL = max(3, int(os.getenv('INVENTAR_NOTIFICATION_STATUS_CACHE_TTL', '8')))
@@ -3338,7 +3338,7 @@ def api_library_items():
                 client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
                 db = client[cfg.MONGODB_DB]
                 student_cards = db['student_cards']
-                card = student_cards.find_one({'_id': ObjectId(borrow_id)})
+                card = student_cards.find_one({'_id': ObjectId(borrower)}) if borrower else None
                 card = _decrypt_student_card_doc(card)
                 client.close()
                 borrower = card['SchülerName']