Input-ids, labels in the data preparation notebook

Hi all, in the notebook about data preparation (can be downloaded as 04_Data_preparation_lab_student.ipynb) the way the labels are created confuses me bit:

tokenized_dataset = tokenized_dataset.add_column(“labels”, tokenized_dataset[“input_ids”])

if I understand this correctly the labels are the same as the input_ids. shouldn’t the labels be shifted with respect to the input_ids?

Thank you