revert the erroneous change for model setting added in df02498d

    try:

        # if no checkpoint override or the override checkpoint can't be found, remove override entry and load opts checkpoint

        override_checkpoint = p.override_settings.get('sd_model_checkpoint')

        if override_checkpoint is not None and sd_models.checkpoint_alisases.get(override_checkpoint) is None:

        if sd_models.checkpoint_alisases.get(p.override_settings.get('sd_model_checkpoint')) is None:

            p.override_settings.pop('sd_model_checkpoint', None)

            sd_models.reload_model_weights()