So some yaesu radios in addition to various shift/duplex options like off/+/-, have "auto repeater shift" or ARS.
I have added auto as a choice to my duplexes and set it as valid_duplexes:
    DUPLEX = ["", "-", "+", "split", "Auto"]
...
        rf.valid_duplexes = list(self.DUPLEX)

But it's failing like:

Exception running RadioJob: `Auto' is not in valid list: ['', '+', '-', 'split', 'off']
-- Exception: --
Traceback (most recent call last):
  File "/home/jens/build/chirp.hg/chirpui/common.py", line 111, in _execute
    result = func(*self.args, **self.kwargs)
  File "/home/jens/build/chirp.hg/chirp/ft90.py", line 244, in get_memory
    mem.duplex = self.DUPLEX[4]
  File "/home/jens/build/chirp.hg/chirp/chirp_common.py", line 329, in __setattr__
    self._valid_map[name]))
ValueError: `Auto' is not in valid list: ['', '+', '-', 'split', 'off']


Any idea what I'm missing?