devpi upload error

gistfile1.txt

2019-05-28 10:10:02,431 - waitress - ERROR - Exception while serving /root/pypi/+simple/
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/pyramid/tweens.py", line 13, in _error_handler
    response = request.invoke_exception_view(exc_info)
  File "/usr/local/lib/python3.7/site-packages/pyramid/view.py", line 779, in invoke_exception_view
    raise HTTPNotFound
pyramid.httpexceptions.HTTPNotFound: The resource could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/waitress/channel.py", line 356, in service
    task.service()
  File "/usr/local/lib/python3.7/site-packages/waitress/task.py", line 176, in service
    self.execute()
  File "/usr/local/lib/python3.7/site-packages/waitress/task.py", line 447, in execute
    app_iter = self.channel.server.application(env, start_response)
  File "/usr/local/lib/python3.7/site-packages/devpi_server/views.py", line 146, in __call__
    return self.app(environ, start_response)
  File "/usr/local/lib/python3.7/site-packages/pyramid/router.py", line 270, in __call__
    response = self.execution_policy(environ, self)
  File "/usr/local/lib/python3.7/site-packages/pyramid/router.py", line 279, in default_execution_policy
    return request.invoke_exception_view(reraise=True)
  File "/usr/local/lib/python3.7/site-packages/pyramid/view.py", line 778, in invoke_exception_view
    reraise_(*exc_info)
  File "/usr/local/lib/python3.7/site-packages/pyramid/compat.py", line 179, in reraise
    raise value
  File "/usr/local/lib/python3.7/site-packages/pyramid/router.py", line 277, in default_execution_policy
    return router.invoke_request(request)
  File "/usr/local/lib/python3.7/site-packages/pyramid/router.py", line 249, in invoke_request
    response = handle_request(request)
  File "/usr/local/lib/python3.7/site-packages/devpi_server/views.py", line 170, in request_log_handler
    response = handler(request)
  File "/usr/local/lib/python3.7/site-packages/devpi_server/views.py", line 206, in request_tx_handler
    response = handler(request)
  File "/usr/local/lib/python3.7/site-packages/pyramid/tweens.py", line 43, in excview_tween
    response = _error_handler(request, exc)
  File "/usr/local/lib/python3.7/site-packages/pyramid/tweens.py", line 17, in _error_handler
    reraise(*exc_info)
  File "/usr/local/lib/python3.7/site-packages/pyramid/compat.py", line 179, in reraise
    raise value
  File "/usr/local/lib/python3.7/site-packages/pyramid/tweens.py", line 41, in excview_tween
    response = handler(request)
  File "/usr/local/lib/python3.7/site-packages/pyramid/router.py", line 148, in handle_request
    registry, request, context, context_iface, view_name
  File "/usr/local/lib/python3.7/site-packages/pyramid/view.py", line 667, in _call_view
    response = view_callable(context, request)
  File "/usr/local/lib/python3.7/site-packages/pyramid/viewderivers.py", line 401, in viewresult_to_response
    result = view(context, request)
  File "/usr/local/lib/python3.7/site-packages/pyramid/viewderivers.py", line 116, in _class_requestonly_view
    response = getattr(inst, attr)()
  File "/usr/local/lib/python3.7/site-packages/devpi_server/views.py", line 556, in simple_list_all
    stage_results = list(stage.op_sro("list_projects_perstage"))
  File "/usr/local/lib/python3.7/site-packages/devpi_server/model.py", line 567, in op_sro
    yield stage, getattr(stage, opname)(**kw)
  File "/usr/local/lib/python3.7/site-packages/devpi_server/extpypi.py", line 303, in list_projects_perstage
    self.keyfs.restart_read_transaction()
  File "/usr/local/lib/python3.7/site-packages/devpi_server/keyfs.py", line 260, in restart_read_transaction
    assert not tx.write, "can only restart from read transaction"
AssertionError: can only restart from read transaction