Why can't I set fit_kwargs={"verbose": False} to historical backtest?

When I try, I get an error:

ValueError: The following parameters cannot be passed in fit_kwargs: {'verbose'}. Make sure to pass them explicitly to the function/method.

When I only set the verbose, from the historical backtest params, the progress bar is still shown

My goal is to not have the progress bar shown during training, which normally can be done with setting verbose in fit: