package mysql-server-5.7 5.7.27-0ubuntu0.18.04.1 failed to install/upgrade: installed mysql-server-5.7 package post-installation script subprocess returned error exit status 1

[Sven Dewald]

https://bugs.launchpad.net/ubuntu/+source/mysql-5.7/+filebug/0fcb1162-bce6-11e9-a586-0025b3df357a?field.title=package+mysql-server-5.7+5.7.27-0ubuntu0.18.04.1+failed+to+install%2Fupgrade%3A+installed+mysql-server-5.7+package+post-installation+script+subprocess+returned+error+exit+status+1

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: mysql-server-5.7 5.7.27-0ubuntu0.18.04.1
ProcVersionSignature: Ubuntu 4.15.0-55.60~16.04.2-generic 4.15.18
Uname: Linux 4.15.0-55-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
Date: Mon Aug 12 09:37:45 2019
ErrorMessage: installed mysql-server-5.7 package post-installation script subprocess returned error exit status 1
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
 [mysqldump]
 quick
 quote-names
 max_allowed_packet = 16M
MySQLConf.etc.mysql.mysql.conf.d.mysqld_safe_syslog.cnf:
 [mysqld_safe]
 syslog
MySQLVarLibDirListing: ['ib_logfile0', 'ibdata1', 'auto.cnf', 'mysql', 'ib_buffer_pool', 'ib_logfile1', 'debian-5.7.flag']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.15.0-55-generic root=UUID=52c6959b-79b0-4bdd-8ed6-71e0ba782fb4 ro console=ttyS0
Python3Details: /usr/bin/python3.6, Python 3.6.8, python3-minimal, 3.6.7-1~18.04
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.1
 apt 1.6.11
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.27-0ubuntu0.18.04.1 failed to install/upgrade: installed mysql-server-5.7 package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2019-08-12 (0 days ago)