'message': 'User errors were found in at least one of the child runs.'

Question

image_config_yolov5 = AutoMLImageConfig(task=ImageTask.IMAGE_OBJECT_DETECTION,
compute_target=compute_target,
training_data=training_dataset,
validation_data=validation_dataset,
hyperparameter_sampling=GridParameterSampling({'model_name': choice('yolov5')}),
iterations=1)
automl_image_run = experiment.submit(image_config_yolov5)
automl_image_run.wait_for_completion(wait_post_processing=True)

while running this code am getting this error. Am not getting what this error means.