package xrdp 0.9.6-1 failed to install/upgrade: installed xrdp package post-installation script subprocess returned error exit status 1

[Jason Duerstock]

error occurred during upgrade
running under Hyper-V on Windows 10

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: xrdp 0.9.6-1
ProcVersionSignature: Ubuntu 4.18.0-8.9-generic 4.18.7
Uname: Linux 4.18.0-8-generic x86_64
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
Date: Wed Oct 3 12:34:58 2018
DuplicateSignature:
 package:xrdp:0.9.6-1
 Installing new version of config file /etc/xrdp/xrdp_keyboard.ini ...
 ln: failed to create symbolic link '/etc/xrdp/cert.pem': File exists
 dpkg: error processing package xrdp (--configure):
  installed xrdp package post-installation script subprocess returned error exit status 1
ErrorMessage: installed xrdp package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.6, Python 3.6.6+, python3-minimal, 3.6.6-1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu5
 apt 1.7.0~rc2ubuntu1
SourcePackage: xrdp
Title: package xrdp 0.9.6-1 failed to install/upgrade: installed xrdp package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to cosmic on 2018-10-03 (0 days ago)
mtime.conffile..etc.xrdp.sesman.ini: 2018-08-15T14:36:40.232083
mtime.conffile..etc.xrdp.xrdp.ini: 2018-08-15T14:36:40.228083

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.