You'll have to unpin the global requirement first https://github.com/openstack/requirements/blob/bdc34443a397aa1d280741dbcccfd5e69b7addee/global-requirements.txt#L137
You'll have to unpin the global requirement first https:/ /github. com/openstack/ requirements/ blob/bdc34443a3 97aa1d280741dbc ccfd5e69b7addee /global- requirements. txt#L137