Reply To: Removing dead sources in Debian properly

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And then fix the problem like this

# grep -ri stable /etc
/etc/apt.conf.d/99myDefaultRelease:APT::Default-Release “stable”;

So changing that file to “jessie” would fix it in my case (as I’m on jessie.)

(in my case the filename in /etc/apt.conf.d/ was 00local)

https://superuser.com/questions/575753/how-can-i-fix-the-error-the-value-stable-is-invalid-for-aptdefault-release/575754