ValueError: all is a special split keyword corresponding to the union of all splits

Beginners
1

Hello HF community! I working on a dataset loading script and a i want to load my dataset as four part (train, validation, test and all) But i got an ValueError: all is a special split keyword corresponding to the union of all splits, so cannot be used as key in ._split_generator(). for “all” dataset. How can i solve this ? Here is my code:

def _split_generators(self, dl_manager):
    # ALL data
    path_a, i_path_a = dl_manager.download_and_extract(json_URLS["dataset"]), dl_manager.download(img_URLS["dataset"])
    image_iters_a = dl_manager.iter_archive(i_path_a)

    # TRAIN data
    path_tr, i_path_tr = dl_manager.download_and_extract(json_URLS["train"]), dl_manager.download(img_URLS["train"])
    image_iters_tr = dl_manager.iter_archive(i_path_tr)

    # VAL data
    path_v, i_path_v = dl_manager.download_and_extract(json_URLS["val"]), dl_manager.download(img_URLS["val"])
    image_iters_v = dl_manager.iter_archive(i_path_v)

    # TEST data
    path_ts, i_path_ts = dl_manager.download_and_extract(json_URLS["test"]), dl_manager.download(img_URLS["test"])
    image_iters_ts = dl_manager.iter_archive(i_path_ts)

    return [
        datasets.SplitGenerator(
            name=datasets.Split.TRAIN, 
            gen_kwargs={"filepath": path_tr +f'/train-{projectID}.jsonl',
                        "images": image_iters_tr
                      }
        ),
        datasets.SplitGenerator(
            name=datasets.Split.VALIDATION, 
            gen_kwargs={"filepath": path_v +f'/val-{projectID}.jsonl',
                        "images": image_iters_v
                      }
        ),
        datasets.SplitGenerator(
            name=datasets.Split.TEST, 
            gen_kwargs={"filepath": path_ts +f'/test-{projectID}.jsonl',
                        "images": image_iters_ts
                      }
        ),
        datasets.SplitGenerator(
            name=datasets.Split.ALL, 
            gen_kwargs={"filepath": path_a +f'/dataset-{projectID}.jsonl',
                        "images": image_iters_a
                      }
        ),            
    ]