Common voice dataset importing problem

“bin/import_cv2.py --filter_alphabet data/alphabet.txt deepspeech-data/cv-corpus-12.0-delta-2022-12-07-en/en/”
or the importer is generating three csv files - train-all.csv, other.csv, validated.csv
It is not generating the train.csv, dev.csv, test.csv files. is this a problem or should i manually split the train-all.csv into train, dev, test files.
TIA