[4.2.x] Fixed #34748 -- Fixed queryset crash when grouping by a reference in a subquery.

Regression in dd68af62b2.

Thanks Toan Vuong for the report.

Backport of 4087367ba8 from main

django/db/models/expressions.py

@@ -1181,7 +1181,9 @@ class Ref(Expression):
         return {self.refs}
 
     def relabeled_clone(self, relabels):
-        return self
+        clone = self.copy()
+        clone.source = self.source.relabeled_clone(relabels)
+        return clone
 
     def as_sql(self, compiler, connection):
         return connection.ops.quote_name(self.refs), []

docs/releases/4.2.4.txt

@@ -12,3 +12,6 @@ Bugfixes
 * Fixed a regression in Django 4.2 that caused a crash of
   ``QuerySet.aggregate()`` with aggregates referencing window functions
   (:ticket:`34717`).
+
+* Fixed a regression in Django 4.2 that caused a crash when grouping by a
+  reference in a subquery (:ticket:`34748`).

tests/aggregation/tests.py

@@ -2116,6 +2116,16 @@ class AggregateTestCase(TestCase):
             },
         )
 
+    def test_group_by_reference_subquery(self):
+        author_qs = (
+            Author.objects.annotate(publisher_id=F("book__publisher"))
+            .values("publisher_id")
+            .annotate(cnt=Count("*"))
+            .values("publisher_id")
+        )
+        qs = Publisher.objects.filter(pk__in=author_qs)
+        self.assertCountEqual(qs, [self.p1, self.p2, self.p3, self.p4])
+
 
 class AggregateAnnotationPruningTests(TestCase):
     @classmethod