id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
33596	Subsequent calls to prefetch_related_objects() don't work for model instances that have changed.	Dennis Kliban	nobody	"Our project processes instances in a stream. In some cases the instances are repeated. In these cases, we discovered that prefetch_related_objects() does not work correctly if the list of related objects has changed since the first time prefetch_related_objects() on the instance. I've written a simple reproducer here[0].

In the reproducer, if I call `delattr(book, ""the_authors"")` after adding the author, everything works. 

[0] https://github.com/django/django/commit/73a138665ba20915f51680816120727a5e2ba771"	Bug	closed	Database layer (models, ORM)	3.2	Normal	wontfix		AlexeyNigin François Freitag	Unreviewed	0	0	0	0	0	0