package keystone 2:15.0.0-0ubuntu1.2 failed to install/upgrade: installed keystone package post-installation script subprocess returned error exit status 1

[gadLinux]

Upgrading to disco from bionic it failed to install keystone. It is possible that's a configuration problem but it was working nicely on disco... So I have to further investigate...

ProblemType: Package
DistroRelease: Ubuntu 19.04
Package: keystone 2:15.0.0-0ubuntu1.2
ProcVersionSignature: Ubuntu 4.15.0-66.75-generic 4.15.18
Uname: Linux 4.15.0-66-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.3
Architecture: amd64
Date: Fri Nov 8 22:14:10 2019
DuplicateSignature:
 package:keystone:2:15.0.0-0ubuntu1.2
 Setting up keystone (2:15.0.0-0ubuntu1.2) ...
 dpkg: error processing package keystone (--configure):
  installed keystone package post-installation script subprocess returned error exit status 1
ErrorMessage: installed keystone package post-installation script subprocess returned error exit status 1
PackageArchitecture: all
Python3Details: /usr/bin/python3.7, Python 3.7.3, python3-minimal, 3.7.3-1
PythonDetails: /usr/bin/python2.7, Python 2.7.16, python-minimal, 2.7.16-1
RelatedPackageVersions:
 dpkg 1.19.6ubuntu1.1
 apt 1.8.3
SourcePackage: keystone
Title: package keystone 2:15.0.0-0ubuntu1.2 failed to install/upgrade: installed keystone package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to disco on 2019-11-08 (0 days ago)
modified.conffile..etc.apache2.sites-available.keystone.conf: [deleted]
modified.conffile..etc.keystone.keystone-paste.ini: [modified]
modified.conffile..etc.keystone.keystone.conf: [modified]
mtime.conffile..etc.keystone.keystone-paste.ini: 2016-04-17T23:22:13.590595
mtime.conffile..etc.keystone.keystone.conf: 2019-10-04T11:50:57.826211
mtime.conffile..etc.keystone.keystone.policy.yaml: 2019-09-18T11:08:09
upstart.keystone.override: manual