eduler.config, rescale_betas_zero_snr=True) train a model with v_prediction (add the following argument to the train_text_to_image.py or train_text_to_image_lora.py scripts)   Copied --prediction_type="v_prediction" change the sampler to always start from the last timestep   Copied pipe.scheduler = DDIMScheduler.from_config(pipe.scheduler.config, timestep_spacing="trailing") rescale classifier-free guidance to prevent over-exposure   Copied ima