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-rw-r--r--docs/releases/4.0.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/releases/4.0.txt b/docs/releases/4.0.txt
index 43e94a790b..339147201d 100644
--- a/docs/releases/4.0.txt
+++ b/docs/releases/4.0.txt
@@ -257,6 +257,9 @@ to remove usage of these features.
* ``django.views.i18n.set_language()`` doesn't set the user language in
``request.session`` (key ``_language``).
+* ``alias=None`` is required in the signature of
+ ``django.db.models.Expression.get_group_by_cols()`` subclasses.
+
See :ref:`deprecated-features-3.1` for details on these changes, including how
to remove usage of these features.