I can't update it to new version

[Jogender S. Pratihar]

deb http://de.archive.ubuntu.com/ubuntu eoan-updates main restricted universe multiverse
deb http://de.archive.ubuntu.com/ubuntu eoan-security main restricted universe multiverse
deb http://de.archive.ubuntu.com/ubuntu eoan-backports main restricted universe multiverse

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.44
ProcVersionSignature: Ubuntu 5.4.0-81.91~18.04.1-generic 5.4.128
Uname: Linux 5.4.0-81-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.24
Architecture: amd64
CrashDB: ubuntu
Date: Thu Sep 9 00:03:24 2021
InstallationDate: Installed on 2021-05-25 (106 days ago)
InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2021-09-08 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2021-09-08 23:53:09.907870
 Log time: 2021-09-08 23:53:17.145616
 Log time: 2021-09-08 23:53:58.511048
 Log time: 2021-09-09 00:03:30.543251
VarLogDistupgradeTermlog:

mtime.conffile..etc.update-manager.release-upgrades: 2021-05-25T15:05:35.548989