templates/edit_my_list.html

@@ -59,7 +59,7 @@
       </div>
 
       <label for="title" class="form-label">Kategorie</label>
-      <select id="categories" name="categories[]" multiple>
+      <select id="categories" name="categories" multiple>
         {% for cat in categories %}
         <option value="{{ cat.id }}" {% if cat.id in selected_categories %}selected{% endif %}>
           {{ cat.name }}