Qubes Update tool and Qubes contrib repo fc42

So, https://contrib.qubes-os.org/yum/r4.2/current/vm/fc42 is obviously non-existent.
When updating qubes from within templates, “404” is letting update process nevertheless, while Qubes Update Tool doesn’t. It is painfully annoying.
I don’t want to set skip_if_unavailable=True when “404” because I want it “False” for any other errors.

Any other idea what to do to avoid manual qubes updating?