InvalidOperation exception on dashboard

[rolandgeider]

Just got this by mail. It's possible to crash the application when accessing the dashboard:

Traceback (most recent call last):
  File "/home/wger/venv/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/home/wger/venv/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/wger/venv/lib/python3.8/site-packages/sentry_sdk/integrations/django/views.py", line 67, in sentry_wrapped_callback
    return callback(request, *args, **kwargs)
  File "/home/wger/venv/lib/python3.8/site-packages/django/contrib/auth/decorators.py", line 21, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/home/wger/src/wger/core/views/misc.py", line 153, in dashboard
    template_data['nutritional_info'] = plan.get_nutritional_values()
  File "/home/wger/src/wger/nutrition/models.py", line 166, in get_nutritional_values
    result['per_kg'][key] = result['total'][key] / weight_entry.weight

Exception Type: InvalidOperation at /pt/dashboard
Exception Value: [<class 'decimal.DivisionUndefined'