[Python] Django Function Update

I'm doing the update function but I get a message Page not found

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views.py

def detalle_tarea(request, tarea_id):
if request.method == 'GET':
tarea = get_object_or_404(Tarea, pk=tarea_id)
form = TareaForm(instance=tarea)
return render(request, 'tarea_detalles.html',
{'tarea': tarea, 'form': form})
else:
tarea = get_object_or_404(Tarea, pk=tarea_id)
form = TareaForm(request.POST, instance=tarea)
form.save()
return redirect('tareas')


url.py

from django.contrib import admin
from django.urls import path
from tareas import views

urlpatterns = [
path('admin/', admin.site.urls),
path('', views.inicio, name='inicio'),
path('registrar/', views.registrar, name='registrar'),
path('tareas/', views.tareas, name='tareas'),
path('tareas/crear/', views.crear_tarea, name='crear_tarea'),
path('tareas/<int:tarea_id>/', views.detalle_tarea, name='detalle_tarea')
]


Any suggestion ???

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