The default config contains 44 while it should generally contain 3 splits maximum (train/validation/test). If the splits selected_data_impossible_n1x16a, selected_data_impossible_n2x16a, selected_data_impossible_n4x16a, selected_data_impossible_n8x16a, selected_data_impossible_n16x16a... are not used to differentiate between training and evaluation, please consider defining configs of this dataset instead. You can find how to define configs instead of splits here: https://huggingface.co/docs/hub/datasets-data-files-configuration