Models inheritance in django: how to change PK "_ptr_id" on "id"?

Here is model structure: Client is User, Client can be corporate or person:

    class Client(User):

        #fields

      

    class ClientCorporate(Client):

        #fields

        

        

    class ClientPerson(Client):

        #fields

And client can make orders:

    class Order(models.Model):

        client=models.ForeignKey(Client)

        #fields

I try to create common orders list for any type of client, here is view:

    def orders_list(request):

        client=request.user.client

        return list_detail.object_list(request,

            queryset = client.order_set.all(),

            #templates ...

            )

And it leads to an error:

**DatabaseError while rendering: no such column: cabinets_order.client_id**

I browse db and find that all User childs have column "user_prt_id". I can't find way to change pk name in inherited models. But maybe there is some better approach?

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