title: app.models.MultipleObjectsReturned: get() returned more than one User -- it returned 17
body: <p>I got an error,app.models.MultipleObjectsReturned: get() returned more than one User -- it returned 17! .
  I wanna parse excel and put it to the model(City&amp;Prefecture&amp;Area&amp;User) . I wrote</p>
  
  <pre><code>  fourrows_transpose = list(map(list, zip(*fourrows)))
    val3 = sheet3.cell_value(rowx=0, colx=9)
    user3 = User.objects.get(corporation_id=val3)
    print(user3)
    if user3:
     area = Area.objects.filter(name="America")
     pref = Prefecture.objects.create(name="prefecture", area=user3.area)
     city = City.objects.create(name="city", prefecture=pref)
     price_u1000 = Price.upper1000.objects.get(city=city)
     price_500_1000 = Price.from500to1000.objects.get(city=city)
     price_u500 = Price.under500.objects.get(city=city)
  
     pref.name = "NY"
     pref.save()
  
     for i in range(len(fourrows_transpose)):
         city.name = fourrows_transpose[i][1]
         city.save()
         print(fourrows_transpose[i][1])
  
         price_u1000.name = fourrows_transpose[i][2]
         price_u1000.save()
         print(fourrows_transpose[i][2])
  
         price_500_1000.name = fourrows_transpose[i][3]
         price_500_1000.save()
         print(fourrows_transpose[i][3])
  
         price_u500.name = fourrows_transpose[i][4]
         price_u500.save()
         print(fourrows_transpose[i][4])
  </code></pre>
  
  <p>I wanna put these data
  <code>[['America', '', '', '', ''], ['', '', 'u1000', '500～1000', 'd500'], ['NY', 'City A', '×', '×', '×'], ['', 'City B', '×', '×', '×'], ['', 'City C', '×', '×', '×'], ['', 'City D', '×', '×', '×'], ['', 'City E', '×', '×', '×']]</code>
  to models which is like 'America' to Prefecture's area and City A to City's name and ×　to Price's name . How can I fix this?What should I write it?</p>