MySQL to PostgreSQL migration fails with worklog usermanual

[Quince]

This is a great plugin that we use to slave-drive oversee our devs. Unfortunately, it seems it can't be migrated with the TracMigratePlugin:

./trac-migrate.py --in-place /srv/trac postgres://tracuser:nalkyergatte@127.0.0.1/trac?schema=trac

Worklog needs an upgrade
 * Upgrading Database
Creating work_log table
Updating work_log table (v2)
Updating work_log table (v3)
 * Upgrading usermanual
Traceback (most recent call last):
  File "./trac-migrate.py", line 55, in <module>
    sys.exit(main(sys.argv[1:]) or 0)
  File "./trac-migrate.py", line 51, in main
    return TracMigrationCommand(env)._do_migrate(dest, dburi)
  File "/tmp/m/tracmigrate/admin.py", line 29, in _do_migrate
    return self._do_migrate_inplace(dburi)
  File "/tmp/m/tracmigrate/admin.py", line 60, in _do_migrate_inplace
    env = self._create_env(env_path, dburi)
  File "/tmp/m/tracmigrate/admin.py", line 92, in _create_env
    env = Environment(env_path, create=True, options=options)
  File "/usr/lib/python2.7/site-packages/trac/core.py", line 124, in __call__
    self.__init__(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/trac/env.py", line 288, in __init__
    setup_participant.environment_created()
  File "build/bdist.linux-x86_64/egg/worklog/api.py", line 55, in environment_created
  File "build/bdist.linux-x86_64/egg/worklog/api.py", line 182, in upgrade_environment
  File "build/bdist.linux-x86_64/egg/worklog/api.py", line 146, in do_user_man_update
AttributeError: 'NoneType' object has no attribute 'cursor'

[Quince]

Accidentally double-posted #11669