Error Using ModelForm Wizard For Editing in Django

You can check the code properly here: http://pastebin.com/1Ygq9RZs

1. I have two seperate forms and I used Django ModelForm wizard to create the form. I can create and save the form.Also I created a seperate view for editing of the form, but When I wanted to edit the same form, a field called'name' with 'Unique=True' in the models is always popping out validation error "name already exist"
2.  
3. This shouldn't be happening because I just want to edit one field in the form.
4. #models excerpt
5. class Finhall(models.Model):
6.    user=models.ForeignKey(User)
7.    name=models.CharField(max_length=250, unique=True)
8.    address=models.CharField(max_length=200)
9.    city=models.CharField(max_length=200)
10.    
11.    def __unicode__(self):
12.          return self.name
13.  
14. #editing form views.py
15. @login_required
16. def edit_finhall(request,finhall_id=None,slug=None):
17.    if id:
18.        post=get_object_or_404(Finhall,id=finhall_id,slug=slug)
19.        initial={'0':{'who':post.who,'name':post.name,'main_view':post.main_view,
20.                      
21.                     },
22.                 '1':{'price':post.price,'details':post.details,
23.                      },
24.                 }
25.        if post.user !=request.user:
26.            return HttpResponseForbidden()
27.    else:
28.      initial={'0':{'who':post.who,'name':post.name,'main_view':post.main_view,
29.                      
30.                     },
31.                 '1':{'price':post.price,'details':post.details,
32.                      },
33.                 }
34.        
35.    form=FindventWizard.as_view([FinhallForm1, FinhallForm2],initial_dict=initial)
36.    return form(context=RequestContext(request), request=request)

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