Djangoで　return redirect で frontpage を指定しているのですが、editに使用したリンクにリダイレクトされます。

Djangoで、関数ベースのviewを作成しました。　フォームを送信してredirectしたいのですが、
リダイレクト先が、index.html ( namespace='frontpaga') になりません。

また、formの値も更新されません。

エラー内容はこちらです。

error
1Page not found (404)
2Request Method:	POST
3Request URL:	https://webpage.herokuapp.com/openpricerequesttoowner/

herokuapp.com/ にリダイレクトしたいです。
お手数ですがアドバイスをいただけないでしょうか？

views.py

python
1def OpenPriceRequestToOwner(request, pk):
2    post=Post.objects.get(pk=pk)
3    if request.method == 'POST':
4        form = OpenPriceRequestToOwnerForm(request.POST)
5
6        if form.is_valid():
7            comment=form.save(commit=False)
8            comment.post=post
9            
10            comment.requestpricelog= comment.requestpricelog + '\n'+ str(dt_now = datetime.datetime.now())+ ' ' +request.user.get_username + ' requested to change price to ' + str(comment.requestprice) +'\n   comment: '+ comment.requestpricecomment
11            new_pricestatus=PriceStatus.objects.get(pricestatus="askingtoowner")
12            comment.pricestatus=new_pricestatus
13
14            comment.save()
15            # return redirect("openpricerequesttoowner",pk=post.pk)
16            return redirect("registration:frontpage")
17    else:
18        form=OpenPriceRequestToOwnerForm()
19    
20    return render(request, "registration/openpricerequesttoowner.html", {"post":post, "form":form})
21
22       
23

urls.py

python
1
2urlpatterns=[
3    path('', include("django.contrib.auth.urls")),
4
5    path("",frontpage,name="frontpage"),
6
7    path("<int:pk>/", post_detail, name="post_detail"),
8
9    path('update/<pk>/', views.Update.as_view(), name="update"),
10    path('delete/<pk>/', views.Delete.as_view(), name="delete"),
11
12    path('openpricerequesttoowner/<int:pk>', views.OpenPriceRequestToOwner, name='openpricerequesttoowner'),
13
14]
15

forms.py

python
1class OpenPriceRequestToOwnerForm(forms.ModelForm):
2    class Meta:
3        model=Post
4        fields=["requestprice","requestpricecomment"]

models.py

python
1
2class Post(models.Model):
3    title=models.CharField(max_length=255)
4    due= models.DateTimeField(
5        auto_now=False,
6        editable=True,
7        blank=False,
8        null=False)
9    fromwho = models.CharField(max_length=20)
10    
11    towho = models.ForeignKey(
12        Towho,
13        on_delete=models.CASCADE,
14        default=8)
15        
16    body=models.TextField()
17    posted_date=models.DateTimeField(auto_now_add=True)
18    image = CloudinaryField('image', null=True, blank=True)
19    video = CloudinaryField('video', null=True, blank=True)
20    
21    status = models.ForeignKey(
22        Status, 
23        verbose_name='状況', on_delete=models.PROTECT,
24        default=5)
25
26    price=models.IntegerField(default=50)
27
28    pricestatus = models.ForeignKey(
29        PriceStatus,
30        verbose_name='支払い状況', on_delete= models.PROTECT,
31        default=2
32    )
33
34    requestprice = models.IntegerField(default=0)
35    requestpricecomment = models.TextField(default='')
36    requestpricelog = models.TextField(default='')
37

openpricerequesttoowner.html

pytho
1{% extends "registration/base.html" %} 
2{% block content %} 
3
4
5
6    <!------------------post placed------------->
7    <div class="post block">
8        <br>
9        <br>
10        <h2 class="Send price request to owner" >{{post.title}}</h2>
11        <br>
12        <br>
13        <h3>Current Price: {{post.price}} $.</h3>
14    </div>
15
16    <br>
17    <br>
18    <p>Price request history</p>
19    <br>
20    <br>
21    {{post.requestpricelog}}
22    <br>
23
24    <h3 class="subtitle">Price Change Request</h3>
25    <br>
26    <form action="." method="post" enctype="multipart/form-data"><!-- これは画像投稿よう-->
27        <!-- add photo function here later  -->
28        {% csrf_token%}
29        {{form.as_p}}
30        <div class="field">
31            <div class="control">
32                <button class="button is-danger">Submit</button>
33
34            </div>
35        </div>
36    </form>
37
38
39{% endblock %}
40