Bug#928425: upgrade-reports: Failed to fetch http://ftp.de.debian.org/debian/dists/jessie-updates/InRelease Unable to find expected entry 'main/source/Sources' in Releases file (Wrong sources.list entry or malformed file

Package: upgrade-reports
Severity: important

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
started apper to be up to date
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
repeated apper, looked into several sourceslistfiles but did not understand
   * What was the outcome of this action?
confusion about general system security
   * What outcome did you expect instead?
no error report from apper and the report 'you're up to date

*** End of the template - remove these template lines ***


-- System Information:
Debian Release: 8.11
  APT prefers oldstable-updates
  APT policy: (500, 'oldstable-updates'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-8-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)