Von Wheezy zu Jessie aufgerüstet, Aptitude trifft jedoch immer noch auf Wheezy-URLs

Ich habe Wheezy auf Jessie aktualisiert, indem ich die Versionshinweise befolgt habe - Kapitel 4, aber jetzt aptitude updatebekomme ich URLs, die Wheezy enthalten:

root@debian:/home/paullik# aptitude update Hit http://ftp.ro.debian.org jessie InRelease Hit http://ftp.ro.debian.org jessie-updates InRelease  Hit http://ftp.ro.debian.org jessie-backports InRelease Hit http://security.debian.org jessie/updates InRelease Hit http://ftp.ro.debian.org jessie/main Sources Hit http://ftp.ro.debian.org jessie/main i386 Packages Hit http://ftp.ro.debian.org jessie/contrib i386 Packages  Hit http://ftp.ro.debian.org jessie/non-free i386 Packages Hit http://ftp.ro.debian.org jessie/contrib Translation-en Hit http://ftp.ro.debian.org jessie/main Translation-en  Hit http://ftp.ro.debian.org jessie/non-free Translation-en Hit http://ftp.ro.debian.org jessie-updates/main Sources  Hit http://ftp.ro.debian.org jessie-updates/contrib Sources Hit http://ftp.ro.debian.org jessie-updates/non-free Sources Get: 1 http://ftp.ro.debian.org jessie-updates/main i386 Packages/DiffIndex [229 B] Hit http://ftp.ro.debian.org jessie-updates/contrib i386 Packages Hit http://ftp.ro.debian.org jessie-updates/non-free i386 Packages Hit http://ftp.ro.debian.org jessie-updates/contrib Translation-en Get: 2 http://ftp.ro.debian.org jessie-updates/main Translation-en/DiffIndex [229 B] Hit http://ftp.ro.debian.org jessie-updates/non-free Translation-en Get: 3 http://ftp.ro.debian.org jessie-backports/main i386 Packages/DiffIndex [2,023 B] Hit http://ftp.ro.debian.org jessie-backports/contrib i386 Packages Hit http://ftp.ro.debian.org jessie-backports/non-free i386 Packages Hit http://ftp.ro.debian.org jessie-backports/contrib Translation-en Get: 4 http://ftp.ro.debian.org jessie-backports/main Translation-en/DiffIndex [781 B] Hit http://ftp.ro.debian.org jessie-backports/non-free Translation-en Hit http://ftp.ro.debian.org jessie-backports/main i386 Packages  Hit http://security.debian.org jessie/updates/main Sources Hit http://security.debian.org jessie/updates/contrib Sources Hit http://security.debian.org jessie/updates/non-free Sources Hit http://security.debian.org jessie/updates/main i386 Packages Hit http://security.debian.org jessie/updates/contrib i386 Packages Hit http://security.debian.org jessie/updates/non-free i386 Packages Hit http://security.debian.org jessie/updates/contrib Translation-en Hit http://security.debian.org jessie/updates/main Translation-en Hit http://security.debian.org jessie/updates/non-free Translation-en Hit https://deb.nodesource.com wheezy InRelease Hit https://deb.nodesource.com wheezy/main Sources Hit https://deb.nodesource.com wheezy/main i386 Packages Get: 5 https://deb.nodesource.com wheezy/main Translation-en_US [162 B] Get: 6 https://deb.nodesource.com wheezy/main Translation-en [162 B] Get: 7 https://deb.nodesource.com wheezy/main Translation-en_US [162 B] Get: 8 https://deb.nodesource.com wheezy/main Translation-en [162 B] Get: 9 https://deb.nodesource.com wheezy/main Translation-en_US [162 B] Get: 10 https://deb.nodesource.com wheezy/main Translation-en [162 B] Get: 11 https://deb.nodesource.com wheezy/main Translation-en_US [162 B] Get: 12 https://deb.nodesource.com wheezy/main Translation-en [162 B] Get: 13 https://deb.nodesource.com wheezy/main Translation-en_US [162 B] Ign https://deb.nodesource.com wheezy/main Translation-en_US Get: 14 https://deb.nodesource.com wheezy/main Translation-en [162 B] Ign https://deb.nodesource.com wheezy/main Translation-en Fetched 3,262 B in 8s (366 B/s)  

Meine sources.list:

deb http://ftp.ro.debian.org/debian/ jessie main contrib non-free deb-src http://ftp.ro.debian.org/debian/ jessie main  deb http://security.debian.org/ jessie/updates main contrib non-free deb-src http://security.debian.org/ jessie/updates main contrib non-free  # jessie-updates, previously known as 'volatile' deb http://ftp.ro.debian.org/debian/ jessie-updates main contrib non-free deb-src http://ftp.ro.debian.org/debian/ jessie-updates main contrib non-free  #backports deb http://ftp.ro.debian.org/debian/ jessie-backports main contrib non-free 

Ist das ok? Wie kann ich die Wheezy-URLs entfernen?

PS: apt-get updatehat die gleiche Ausgabe. Der Upgrade-Prozess verlief einwandfrei.