I'm seeing errors like these in your logs:
2019-02-22T22:01:48.488648Z 0 [ERROR] InnoDB: Unable to lock ./ibdata1 error: 11
2019-02-22T22:01:48.488703Z 0 [Note] InnoDB: Check that you do not already have
another mysqld process using the same InnoDB data or log files.
Maybe you have a stale mysql running while trying to install it again? I
suggest to carefully inspect the list of running processes before trying
again.
** Changed in: mysql-5.7 (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1817374
Title:
mysql-server-5.7 5.7.25 upgrade did not complete properly
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