Traceback (most recent call last):
  File "/usr/local/lib/python35/dist-packages/trytond/wsgipy", line 71, in dispatch_request
    return endpoint(request, **requestview_args)
  File "/usr/local/lib/python35/dist-packages/trytond/protocols/dispatcherpy", line 41, in rpc
    request, database_name, *requestrpc_params)
  File "/usr/local/lib/python35/dist-packages/trytond/protocols/dispatcherpy", line 58, in login
    database_name, user, parameters, context=context)
  File "/usr/local/lib/python35/dist-packages/trytond/securitypy", line 21, in login
    with Transaction()start(dbname, 0, context=context) as transaction:
  File "/usr/local/lib/python35/dist-packages/trytond/transactionpy", line 81, in start
    assert selfuser is None
AssertionError