Unable to create multiple sessions from a single connection

>>> import pike.model
>>> conn = pike.model.Client().connect('127.0.0.1').negotiate()
>>> conn.session_setup('admin%a')

>>> conn.session_setup('root%a')
Traceback (most recent call last):
File "", line 1, in
File "/var/crash/tools/lib/python2.7/site-packages/pike/model.py", line 1107, in session_setup
return session_context.submit().result()
File "/var/crash/tools/lib/python2.7/site-packages/pike/model.py", line 1073, in _process
self.session_future(self._finish(smb_res))
File "/var/crash/tools/lib/python2.7/site-packages/pike/model.py", line 1018, in _finish
smb_res.verify(self.conn.signing_digest(), signing_key)
File "/var/crash/tools/lib/python2.7/site-packages/pike/smb2.py", line 304, in verify
raise core.BadPacket()
pike.core.BadPacket
>>>