package unattended-upgrades 1.5ubuntu3.18.10.2 failed to install/upgrade: installed unattended-upgrades package post-installation script subprocess returned error exit status 10

[Manish]

having system problem

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: unattended-upgrades 1.5ubuntu3.18.10.2
ProcVersionSignature: Ubuntu 4.18.0-16.17-generic 4.18.20
Uname: Linux 4.18.0-16-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
Date: Mon Mar 11 08:59:24 2019
ErrorMessage: installed unattended-upgrades package post-installation script subprocess returned error exit status 10
InstallationDate: Installed on 2019-02-22 (16 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.7, unpackaged
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu5
 apt 1.7.2
SourcePackage: unattended-upgrades
Title: package unattended-upgrades 1.5ubuntu3.18.10.2 failed to install/upgrade: installed unattended-upgrades package post-installation script subprocess returned error exit status 10
UpgradeStatus: No upgrade log present (probably fresh install)