@<1720249421582569472:profile|NonchalantSeaanemone34>

dso = Dataset.create(
        dataset_project= project_name,
        dataset_name= dataset_name,
        parent_datasets=[parent_datasets_id],
)
dso = Dataset.get(
        dataset_project= project_name,
        dataset_name= dataset_name,
        only_completed=True,
        only_published=False,
        alias='latest',
)

why are you creating a dataset then getting a dataset on the same object?
it seems you are trying to upload to the existing dataset and not the newly created one notice in both cases dso is the variable name