djongo Distinct: NotSupportedError

One line description of the issue

so, i have repeated elements and i'm trying to use distinct to filter then by one field. But i'm getting "DISTINCT ON fields is not supported by this database backend", any thoughts?

Python script

return object_list.order_by('name').distinct('registration')


#### Traceback
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  126.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  124.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/base.py" in dispatch
  88.         return handler(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/list.py" in get
  157.         context = self.get_context_data()

File "/code/portal/views.py" in get_context_data
  77.         context = super().get_context_data(*args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/list.py" in get_context_data
  119.             paginator, page, queryset, is_paginated = self.paginate_queryset(queryset, page_size)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/list.py" in paginate_queryset
  69.             page = paginator.page(page_number)

File "/usr/local/lib/python3.6/site-packages/django/core/paginator.py" in page
  67.         number = self.validate_number(number)

File "/usr/local/lib/python3.6/site-packages/django/core/paginator.py" in validate_number
  45.         if number > self.num_pages:

File "/usr/local/lib/python3.6/site-packages/django/utils/functional.py" in __get__
  37.         res = instance.__dict__[self.name] = self.func(instance)

File "/usr/local/lib/python3.6/site-packages/django/core/paginator.py" in num_pages
  97.         if self.count == 0 and not self.allow_empty_first_page:

File "/usr/local/lib/python3.6/site-packages/django/utils/functional.py" in __get__
  37.         res = instance.__dict__[self.name] = self.func(instance)

File "/usr/local/lib/python3.6/site-packages/django/core/paginator.py" in count
  87.             return self.object_list.count()

File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py" in count
  383.         return self.query.get_count(using=self.db)

File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py" in get_count
  498.         number = obj.get_aggregation(using, ['__count'])['__count']

File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py" in get_aggregation
  466.                 outer_query.add_subquery(inner_query, using)

File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/subqueries.py" in add_subquery
  193.         self.subquery, self.sub_params = query.get_compiler(using).as_sql(with_col_aliases=True)

File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/compiler.py" in as_sql
  472.                         distinct_params,

File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/operations.py" in distinct_sql
  171.             raise NotSupportedError('DISTINCT ON fields is not supported by this database backend')

Exception Type: NotSupportedError at /recursos-humanos/lista/
Exception Value: DISTINCT ON fields is not supported by this database backend