Comment 0 for bug 1744722

During update after release 'zesty' 'end of life' strange error appear:

E:The repository 'http://archive.ubuntu.com/ubuntu stable Release' does not have a Release file.

This error prevent upgrade process. There is no entry like 'http://archive.ubuntu.com/ubuntu stable Release' in my 'sources.list'. I have no idea where this entry comes from. During regular packages update try, only appears error messages directly related to 'end of life' release state. No error like above. I am not sure, but it seems like 'http://archive.ubuntu.com/ubuntu stable Release' is wrongly formatted and have no idea where this comes from as all. Here is my sources list (as is now). As could be seen from the sources list my install is from 2014. Over the years I make upgrade after 'end of life' release few times without any problems. Now is the first time I have such issue.
Thanks in advance!

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: ubuntu-release-upgrader-core 1:17.04.10
ProcVersionSignature: Ubuntu 4.10.0-42.46-generic 4.10.17
Uname: Linux 4.10.0-42-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.4-0ubuntu4.10
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Mon Jan 22 15:56:24 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-07-12 (1289 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to zesty on 2018-01-20 (2 days ago)
VarLogDistupgradeAptlog:
 Log time: 2018-01-20 03:20:51.814404
 Log time: 2018-01-20 03:20:56.946483
 Log time: 2018-01-20 03:21:25.049488