# Dataset$previous\_version

### Dataset$<mark style="color:purple;">previous\_version</mark>() → [Dataset](https://docs.redivis.com/api/client-libraries/redivis-r/reference/dataset) | None

Returns a reference to the dataset at its previous version, or `None` if no previous version exists.

### **Returns**

[**Dataset**](https://docs.redivis.com/api/client-libraries/redivis-r/reference/dataset) **| None**