# Pastebin 7icf0RWH
devstack (master)$ watcher-db-manage create-schema
Traceback (most recent call last):
  File "/usr/local/bin/watcher-db-manage", line 6, in <module>
    from watcher.cmd.dbmanage import main
  File "/opt/stack/watcher/watcher/cmd/dbmanage.py", line 28, in <module>
    from watcher.db import purge
  File "/opt/stack/watcher/watcher/db/purge.py", line 115, in <module>
    class PurgeCommand(object):
  File "/opt/stack/watcher/watcher/db/purge.py", line 127, in PurgeCommand
    ctx = context.make_context(show_deleted=True)
  File "/opt/stack/watcher/watcher/common/context.py", line 125, in make_context
    return RequestContext(*args, **kwargs)
  File "/opt/stack/watcher/watcher/common/context.py", line 66, in __init__
    roles=roles)
TypeError: __init__() got an unexpected keyword argument 'roles'