# Dataset.unrelease

### Dataset.<mark style="color:purple;">unrelease</mark>() → self

Unreleases the `current` version of the dataset, setting it back to the `next` version. A version of a dataset can only be unreleased within a 7-day window from when it was released, and cannot be unreleased if a `next` version already exists (in this case, first [delete the next version](https://docs.redivis.com/api/client-libraries/redivis-python/reference/version/version.delete)).

### **Returns:**&#x20;

**self (a** [**Dataset**](https://docs.redivis.com/api/client-libraries/redivis-python/reference/dataset)**)**

### Examples:

{% tabs %}
{% tab title="Release and unrelease a version" %}

```python
dataset = redivis.user("my_username").dataset("My dataset")
dataset = dataset.create_next_version()

upload = dataset.table("My table").upload("data.csv")

# We can upload new data to existing tables once we have a "next" version
with open("data.csv", "rb") as file:
    upload.upload_file(file)
    
# This moves the "next" version to current
dataset.release()

# If we realize we've made a mistake, we can reset to how the dataset was before
# it was released:
dataset.unrelease()
```

{% endtab %}
{% endtabs %}