Traceback (most recent call last):
  File "trezorlib/client.py", line 140, in cancel
  File "trezorlib/client.py", line 158, in _raw_write
  File "trezorlib/transport/bridge.py", line 174, in write
  File "trezorlib/transport/bridge.py", line 76, in write_buf
  File "trezorlib/transport/bridge.py", line 143, in _call
  File "trezorlib/transport/bridge.py", line 52, in call_bridge
trezorlib.transport.bridge.BridgeException: trezord: post/279 failed with code 400: other call in progress