Routing to the existing sink causes error

[cohoe]

grant@seefra ~ » maxime.py --route wireless
05/18/2018 23:21:50 INFO: Moving stream of "LADSPA Stream" to "LADSPA Plugin Multiband EQ on Bose QuietComfort 35"
Traceback (most recent call last):
  File "/usr/local/bin/maxime.py", line 898, in <module>
    main()
  File "/usr/local/bin/maxime.py", line 879, in main
    max.route(pulse)
  File "/usr/local/bin/maxime.py", line 348, in route
    pulse.activate_wireless(conn_event=False)
  File "/usr/local/bin/maxime.py", line 692, in activate_wireless
    self._move_output(self.ladspa_device, target_device, DBusHelper.ICON_WIRELESS)
  File "/usr/local/bin/maxime.py", line 816, in _move_output
    self.pulse_conn.sink_input_move(source.index, destination.index)
  File "/usr/lib/python2.7/site-packages/pulsectl/pulsectl.py", line 556, in _wrapper
    except c.pa.CallError as err: raise PulseOperationInvalid(err.args[-1])
  File "/usr/lib64/python2.7/contextlib.py", line 24, in __exit__
    self.gen.next()
  File "/usr/lib/python2.7/site-packages/pulsectl/pulsectl.py", line 452, in _pulse_op_cb
    if not self._actions[act_id]: raise PulseOperationFailed(act_id)
pulsectl.pulsectl.PulseOperationFailed: 2