---
title: "Major Bug deletes Undertale save data"
url: "https://www.nintendoreporters.com/en/news/nintendo-switch/major-bug-deletes-undertale-save-data/"
description: "Undertale developer 8-4, Ltd. has confirmed that a major issue is affecting the progress of players on Nintendo Switch."
author: "Patrick Dankers"
published at: "2018-09-27 14:15:43"
image: "https://www.nintendoreporters.com/storage/files/major-bug-deletes-undertale-save-data.jpg"
markdown url: "https://www.nintendoreporters.com/en/news/nintendo-switch/major-bug-deletes-undertale-save-data.md"
---

Major Bug deletes Undertale save data | Nintendo Switch News | NintendoReporters

 [![Major Bug deletes Undertale save data](https://www.nintendoreporters.com/storage/files/major-bug-deletes-undertale-save-data.jpg "Major Bug deletes Undertale save data")](https://www.nintendoreporters.com/storage/files/major-bug-deletes-undertale-save-data.jpg)Undertale developer 8-4, Ltd. has confirmed that a major issue is affecting the progress of players on Nintendo Switch.

## [](#a-unwelcome-surprise)A unwelcome surprise

The bug in question can lead to the permanent loss of your save data when you start-up the game. However, you can rest assured that a fix is in the works and will hopefully be made available soon. In the meantime, you may want to adhere to the developer’s advice in the embedded post below:

> Quick notice for Switch Undertale owners: there is a bug that can lead to accidental loss of save data if you don't select a user when you startup the game. A fix has been submitted, but for now, please make sure you select a user! (Don't press B to back out of this screen!) [pic.twitter.com/ldTxbdf3Xq](https://t.co/ldTxbdf3Xq)
>
> — UNDERTALE (@UnderTale) [September 18, 2018](https://twitter.com/UnderTale/status/1042196889607725058?ref_src=twsrc%5Etfw)

But luckily they acted quick;

> The 1.11 patch for UNDERTALE for Nintendo Switch is now live! It fixes the bug involving user-selection mentioned here. <https://t.co/ZEo9TXKdex>
>
> — UNDERTALE (@UnderTale) [September 26, 2018](https://twitter.com/UnderTale/status/1044816028453294080?ref_src=twsrc%5Etfw)

So update people, update!

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