Реверс для 'admin_update' с аргументами '('',)' не найден. Проверен 1 шаблон(ы): ['admin_update/(?P<lesson_id>[^/]+)$'].

Я пытаюсь передать аргументы для редактирования значений таблицы. Буду благодарен, если кто-нибудь подскажет решение.

views.py `

#@login_required(login_url='/admin_login/')
def AdminManageRequests(request):
    lessons = Lesson.objects.all()
    return render(request,'admin/manage_requests.html',{'lessons':lessons})


def AdminUpdateRequests(request, lesson_id):
    lesson = Lesson.objects.get(pk=lesson_id)
    form = StudentRequestForm(request.POST or None, instance=lesson)
    context = {
        'lesson':lesson, 'form':form
    }
    return render(request, 'admin/update_requests.html',context)

`

urls.py `

path('admin_update/<lesson_id>', views.AdminUpdateRequests, name='admin_update'),

`

manage_requests.html `

{% extends 'admin/admin_home_base.html' %}
{% block admin_content %}
<div>
  <h3 class="display-8" style="text-align:center">
      Admin Lesson Request Management
  </h3>
  <hr class="my-4">
  <p style="text-align:center">
      You can view fulfilled and unfulfilled lesson requests.
  </p>
  <p class="lead" style="text-align:center">
    {% include 'admin/partials/fulfilled_lessons.html' %}
    <br>
    {% include 'admin/partials/unfulfilled_lessons.html' %}
  </p>
</div>
{% endblock %}

`

lessons_table_base.html `

<div class="card">
  <div class="card-header">
    <h5 class="card-title">{% block card_title %}{% endblock %}</h5>
      <div class="card-body table-responsive p-0">
        <table class="table table-hover text-nowrap">
          <thead>
            <tr>
              <th>Lesson ID</th>
              <th>Lesson Name</th>
              <th>Student</th>
              <th>Teacher</th>
              <th>Interval (Days)</th>
              <th>Duration (Minutes)</th>
              <th></th>
            </tr>
          </thead>
          <tbody>
          {% for lesson in lessons %}                       
          {% block lessons_content %}
          {% endblock %}
          {% endfor %}
          </tbody>
        </table>
      </div>
  </div>
</div>

`

fulfilled_lessons.html `

{% extends 'admin/partials/lessons_table_base.html' %}
{% load widget_tweaks %}
{% block card_title %}
Fulfilled Requests&nbsp;&nbsp;<i class="bi-send-check-fill"></i>
{% endblock %}
{% block lessons_content %}
{% if not lesson.is_request %}
    <tr>
    <td>{{ lesson.lesson_id }}</td>
    <td>{{ lesson.lesson_name }}</td>
    <td>{{ lesson.student }}</td>
    <td>{{ lesson.teacher }}</td>
    <td>{{ lesson.interval }}</td>
    <td>{{ lesson.duration }}</td>
    <td>
        <!-- admin edit lesson here -->
        <a href="{% url 'admin_update' lesson.id %}">update</a>  
        <!-- admin delete lesson here -->
        <a href="#" class="nav-link" role="button" data-bs-toggle="tooltip" title="Remove lesson">
            <span class="bi-dash-square"></span>
        </a>
    </td>
    </tr>
{% endif %}
{% endblock %}

`

updates_requests.html (будет добавлен дополнительный код, когда проблема будет решена). `

{% extends 'admin/admin_home_base.html' %}
{% block admin_content %}
<div>
    <h2  style="text-align:center">
    Update Lesson Request
    </h2>
    <hr class="my-4">
    <p style="text-align:center">
        You can update lessons to the system.
    </p>
    <form action="" method=POST>
        {% csrf_token %}
        {{form.as_p}}
        <input type="submit" value="Update" class="btn btn-secondary">
    </form>
   
</div>
{% endblock %}

`

отступления `

`

Я пробовал некоторые решения, но ничего не помогло. Кто-нибудь может помочь?

path('admin_update/<int:lesson_id>/', views.AdminUpdateRequests, name='admin_update'),

lesson = get_object_or_404(Lesson,pk=lesson_id)