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Can't Delete a user

See original GitHub issue

Getting this error on user deletion on version redash.0.9.1.b1377

root@ip-172-31-26-238:/opt/redash/current# sudo -u redash bin/run ./manage.py users delete admin
[2016-01-27 00:29:14,101][PID:30373][WARNING][redash.query_runner] MQL query runner enabled but not supported, not registering. Either disable or install missing dependencies.
[2016-01-27 00:29:14,139][PID:30373][WARNING][redash.query_runner] Oracle query runner enabled but not supported, not registering. Either disable or install missing dependencies.
[2016-01-27 00:29:14,333][PID:30373][ERROR][peewee] DELETE FROM "users" WHERE ("email" = %s) [u'admin']
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/playhouse/postgres_ext.py", line 360, in execute_sql
    cursor.execute(sql, params or ())
IntegrityError: update or delete on table "users" violates foreign key constraint "events_user_id_fkey" on table "events"
DETAIL:  Key (id)=(26) is still referenced from table "events".

Traceback (most recent call last):
  File "/opt/redash/redash.0.9.1.b1377/manage.py", line 58, in <module>
    manager.run()
  File "/usr/local/lib/python2.7/dist-packages/flask_script/__init__.py", line 405, in run
    result = self.handle(sys.argv[0], sys.argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/flask_script/__init__.py", line 384, in handle
    return handle(app, *positional_args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/flask_script/commands.py", line 145, in handle
    return self.run(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/flask/ctx.py", line 386, in __exit__
    self.auto_pop(exc_value)
  File "/usr/local/lib/python2.7/dist-packages/flask/ctx.py", line 374, in auto_pop
    self.pop(exc)
  File "/usr/local/lib/python2.7/dist-packages/flask/ctx.py", line 341, in pop
    self.app.do_teardown_request(exc)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1714, in do_teardown_request
    rv = func(exc)
  File "/opt/redash/redash.0.9.1.b1377/redash/metrics/request.py", line 39, in calculate_metrics_on_exception
    calculate_metrics(MockResponse(500, '?', -1))
  File "/opt/redash/redash.0.9.1.b1377/redash/metrics/request.py", line 17, in calculate_metrics
    request_duration = (time.time() - g.start_time) * 1000
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 343, in __getattr__
    return getattr(self._get_current_object(), name)
AttributeError: '_AppCtxGlobals' object has no attribute 'start_time'