AssertionError: Device <shot.my_first_shot> cannot be overloaded.

[gbouthenot]

I am following the tutorial and at the 18th step (https://missionpinball.org/tutorial/18_shots/)

shots:
  my_first_shot:
    profile: mode2

Is supposed to override the mode for "my_first_shot" shot. But it triggers this Exception:

ERROR : Machine : Runtime Exception
Traceback (most recent call last):
  File "envs/mpf-056/lib/python3.9/site-packages/mpf/core/machine.py", line 797, in _run_loop
    raise self._exception['exception']
  File "lib/python3.9/asyncio/events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "envs/mpf-056/lib/python3.9/site-packages/mpf/core/events.py", line 121, in _async_handler_done
    future.result()
  File "envs/mpf-056/lib/python3.9/site-packages/mpf/core/device_manager.py", line 90, in _load_device_modules
    await self.machine.mode_controller.load_mode_devices()
  File "envs/mpf-056/lib/python3.9/site-packages/mpf/core/mode_controller.py", line 86, in load_mode_devices
    await mode.load_mode_devices()
  File "envs/mpf-056/lib/python3.9/site-packages/mpf/core/mode.py", line 438, in load_mode_devices
    device.overload_config_in_mode(self, settings)
  File "envs/mpf-056/lib/python3.9/site-packages/mpf/core/mode_device.py", line 56, in overload_config_in_mode
    raise AssertionError("Device {} cannot be overloaded.".format(self))
AssertionError: Device <shot.my_first_shot> cannot be overloaded.

Please note, that actually, the tutorial actually define an other shos instead of overloading "my_first_shot":

shots:
  my_first_shot_mode2:
    switch: s_right_inlane
    profile: mode2

But a few line after, the supposed block is shown

shots:
  my_first_shot:
    profile: mode2

This is what is triggering the error. The tutorial in step 18 (in mpc-examples repository) use the "other shot", so I think this is a known problem. But the tutorial is wrong saying that (it does not work)

However, unlike the "my_first_shot" entry in the base mode config, in the mode2 config we did NOT redefine the switch: or show_tokens: entries. Instead, we just added the profile: setting and told it to use a profile called mode2.

mpf version 0.56.2
mpf-mc version 0.56.1