# Django 3.0.9.dev - dokumentacja

# Informacje o wydaniu Django 3.0.2

January 2, 2020

Django 3.0.2 naprawia kilka błędów z wersji 3.0.1.

## Poprawki błędów

- Fixed a regression in Django 3.0 that didn’t include columns referenced by a `Subquery()` in the `GROUP BY` clause (#31094).
- Fixed a regression in Django 3.0 where `QuerySet.exists()` crashed if a queryset contained an aggregation over a `Subquery()` (#31109).
- Fixed a regression in Django 3.0 that caused a migration crash on PostgreSQL 10+ when adding a foreign key and changing data in the same migration (#31106).
- Fixed a regression in Django 3.0 where loading fixtures crashed for models defining a `default` for the primary key (#31071).