Refs #31926 -- Fixed reverse related identity crash on Q() limit_choices_to.

django/db/models/fields/reverse_related.py

@@ -123,7 +123,7 @@ class ForeignObjectRel(FieldCacheMixin):
             self.model,
             self.related_name,
             self.related_query_name,
-            tuple(sorted(make_hashable(self.limit_choices_to))),
+            make_hashable(self.limit_choices_to),
             self.parent_link,
             self.on_delete,
             self.symmetrical,

tests/queryset_pickle/models.py

@@ -37,7 +37,7 @@ class Group(models.Model):
 
 class Event(models.Model):
     title = models.CharField(max_length=100)
-    group = models.ForeignKey(Group, models.CASCADE)
+    group = models.ForeignKey(Group, models.CASCADE, limit_choices_to=models.Q())
 
 
 class Happening(models.Model):