Chart Selected Position

[simpsus]

Traceback (most recent call last):
  File "/home/bastian/workspace/avernus/avernus/gui/threads.py", line 36, in run
    for ret in self.generator(self.args):
  File "/home/bastian/workspace/avernus/avernus/controller/datasource_controller.py", line 115, in get_historical_prices
    low=qt[5], close=qt[6], volume=qt[7])
  File "<string>", line 4, in __init__
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/state.py", line 98, in initialize_instance
    return manager.original_init(*mixed[1:], **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/ext/declarative.py", line 1567, in _declarative_constructor
    setattr(self, k, kwargs[k])
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 155, in __set__
    instance_dict(instance), value, None)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 697, in set
    value = self.fire_replace_event(state, dict_, value, old, initiator)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/attributes.py", line 717, in fire_replace_event
    value = fn(state, value, previous, initiator or self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/unitofwork.py", line 67, in set_
    sess._save_or_update_state(newvalue_state)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1369, in _save_or_update_state
    self._save_or_update_impl(state)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1628, in _save_or_update_impl
    self._update_impl(state)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1620, in _update_impl
    self._attach(state)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 1656, in _attach
    state.session_id, self.hash_key))
InvalidRequestError: Object '<Fund at 0x2d253c0>' is already attached to session '1' (this is '2')

Tested with only one position so far as I try to find bugs and that is best with not too many positions