diff --git a/Web/app.py b/Web/app.py
index eb75d20..23c76a4 100755
--- a/Web/app.py
+++ b/Web/app.py
@@ -2102,6 +2102,20 @@ def _build_student_card_excel_id(student_name, class_name, row_number, used_ids)
     return candidate
 
 
+def generate_ausweis_id_excel(existing_ids_set):
+    """Generates a unique ID and checks against DB and current import queue."""
+    while True:
+        random_digits = "".join(random.choices(string.digits, k=6))
+        new_id = f"ID_{random_digits}"
+
+        # Prüfe sowohl in den bereits in dieser Session generierten IDs als auch in der DB
+        if new_id.upper() not in existing_ids_set and not us.get_user_by_student_card(new_id):
+            print(f"Generated unique ID: {new_id}")
+            return new_id
+        else:
+            print(f"Already found: {new_id}, trying another...")
+
+
 def _upload_student_cards_excel():
     """Bulk import student cards from Excel with automatic name/class mapping."""
     if 'username' not in session:
@@ -2142,12 +2156,12 @@ def _upload_student_cards_excel():
 
     synonyms = {
         'ausweis_id': ['ausweis_id', 'ausweisid', 'ausweis-id', 'karte', 'kartennummer', 'card_id', 'id'],
-        'student_name': ['student_name', 'schuelername', 'schülername', 'schueler', 'schüler', 'name', 'vollname', 'vorname_nachname', 'nachname_vorname'],
         'first_name': ['vorname', 'first_name', 'firstname', 'rufname'],
         'last_name': ['nachname', 'last_name', 'lastname'],
         'class_name': ['klasse', 'class', 'class_name', 'jahrgang', 'jahrgangsstufe', 'stufe', 'gruppe', 'asv_klasse'],
         'notes': ['notizen', 'notes', 'bemerkungen', 'bemerkung', 'hinweis', 'hinweise'],
-        'default_borrow_days': ['standard_ausleihdauer', 'ausleihdauer', 'borrow_days', 'tage', 'leihtage', 'max_borrow_days'],
+        'default_borrow_days': ['standard_ausleihdauer', 'ausleihdauer', 'borrow_days', 'tage', 'leihtage',
+                                'max_borrow_days'],
     }
 
     def col_index(key):
@@ -2159,7 +2173,6 @@ def _upload_student_cards_excel():
 
     mapped_indices = {
         'ausweis_id': col_index('ausweis_id'),
-        'student_name': col_index('student_name'),
         'first_name': col_index('first_name'),
         'last_name': col_index('last_name'),
         'class_name': col_index('class_name'),
@@ -2178,10 +2191,11 @@ def _upload_student_cards_excel():
     client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
     try:
         db = client[cfg.MONGODB_DB]
-        student_cards = list(db['student_cards'].find())
+
+        student_cards_cursor = db['student_cards'].find({}, {'AusweisId': 1})
         existing_ids.update(
             str(card.get('AusweisId', '')).strip().upper()
-            for card in student_cards.find({}, {'AusweisId': 1})
+            for card in student_cards_cursor
             if card.get('AusweisId')
         )
 
@@ -2199,27 +2213,29 @@ def _upload_student_cards_excel():
                 return row_values[idx]
 
             ausweis_id = sanitize_form_value(val('ausweis_id'))
-            student_name = sanitize_form_value(val('student_name'))
-            first_name = sanitize_form_value(val('first_name'))
-            last_name = sanitize_form_value(val('last_name'))
             class_name = sanitize_form_value(val('class_name'))
             notes = sanitize_form_value(val('notes'))
-            default_borrow_days = _excel_int(val('default_borrow_days')) or cfg.STUDENT_DEFAULT_BORROW_DAYS
 
-            if not student_name and first_name and last_name:
-                student_name = f'{first_name} {last_name}'.strip()
-                validation_warnings.append((row_number, 'Schülername wurde aus Vorname und Nachname zusammengesetzt'))
+            default_borrow_days = _excel_int(val('default_borrow_days'))
+            if not default_borrow_days:
+                default_borrow_days = 14
+
+            first_name = sanitize_form_value(val('first_name')) or ""
+            last_name = sanitize_form_value(val('last_name')) or ""
+            student_name = f"{first_name} {last_name}".strip()
 
             if not ausweis_id and not student_name and not class_name:
                 continue
 
             row_errors = []
+
             if not student_name:
-                row_errors.append('Schülername fehlt')
+                row_errors.append('Vorname und Nachname fehlen')
 
             if not ausweis_id and student_name:
-                ausweis_id = _build_student_card_excel_id(student_name, class_name, row_number, existing_ids)
+                ausweis_id = generate_ausweis_id_excel(existing_ids)
                 validation_warnings.append((row_number, f'Ausweis-ID wurde automatisch erzeugt: {ausweis_id}'))
+                existing_ids.add(ausweis_id.upper())
             elif ausweis_id:
                 ausweis_id = str(ausweis_id).strip().upper()
                 if ausweis_id in existing_ids:
diff --git a/Web/templates/student_cards_admin.html b/Web/templates/student_cards_admin.html
index 9fbf281..b41717b 100644
--- a/Web/templates/student_cards_admin.html
+++ b/Web/templates/student_cards_admin.html
@@ -249,7 +249,7 @@
 
     <div style="border:1px solid #dbe4ee; border-radius:8px; padding:14px; margin-bottom:16px; background:#f8fbff;">
         <h3 style="margin:0 0 8px 0;">Excel-Import Bibliotheksausweise</h3>
-        <p style="margin:0 0 10px 0; color:#555;">Laden Sie eine <strong>.xlsx</strong>- oder <strong>.csv</strong>-Datei hoch, zum Beispiel aus <strong>ASV (Amtliche Schuldaten)</strong>. Erkannt werden automatisch Spalten wie <strong>Name</strong>, <strong>Klasse</strong>, <strong>Ausweis-ID</strong>, <strong>Notizen</strong> und <strong>Standard-Ausleihdauer</strong>. Fehlt die Ausweis-ID, wird sie automatisch aus Name und Klasse erzeugt.</p>
+        <p style="margin:0 0 10px 0; color:#555;">Laden Sie eine <strong>.xlsx</strong>- oder <strong>.csv</strong>-Datei hoch, zum Beispiel aus <strong>ASV (Amtliche Schuldaten)</strong>. Erkannt werden automatisch Spalten wie <strong>Name</strong>, <strong>Nachname</strong, <strong>Klasse</strong>, <strong>Ausweis-ID (optional)</strong>, <strong>Notizen (optional)</strong> und <strong>Standard-Ausleihdauer (optional)</strong>.</p>
         <form method="POST" action="{{ url_for('upload_student_cards_excel') }}" enctype="multipart/form-data" style="display:flex; gap:10px; flex-wrap:wrap; align-items:center;">
             <input type="file" name="student_cards_excel" accept=".xlsx,.csv" required>
             <button type="submit" class="btn btn-secondary" name="excel_action" value="validate">Nur validieren</button>