# SYNC341: App update required

## What this means[​](#what-this-means "What this means으로 직접 링크")

This store now requires a newer version of the POS app.

Your store's WCPOS plugin has moved to a newer sync protocol than this version of the app speaks, and the store deliberately pauses syncing until the app is updated. This is a protection, not a fault: it stops an out-of-date app from reading or writing store data incorrectly.

## Your data[​](#your-data "Your data으로 직접 링크")

Nothing on the till is lost. Sales and edits waiting to be sent stay safely on the device and sync once an updated app connects to the store. If no newer app exists yet (see the last two steps below), they stay queued until one does.

## Troubleshoot[​](#troubleshoot "Troubleshoot으로 직접 링크")

1. On the web app, reload the browser tab — the web app picks up the new version on reload. If the screen comes back, use a hard reload (hold **Shift** while reloading).
2. On desktop, install the pending update and reopen the app — the check runs when the app reconnects. If no update is offered, download the latest build from the [Installation](/ko/getting-started/installation.md) page.
3. On iPhone, iPad or Android, update WCPOS through the channel you installed it from — TestFlight on iOS, the Play testing programme on Android; both are linked from the [Installation](/ko/getting-started/installation.md) page — then reopen the app.
4. **Site administrator:** if no newer app is available yet, the store's WCPOS plugin was updated ahead of the matching app release. Restoring the previous WCPOS plugin version on the store resumes syncing until the newer app ships.
5. If neither an app update nor a plugin rollback is available to you, contact WCPOS support.

## Details[​](#details "Details으로 직접 링크")

* Code

  `SYNC341` (`APP_UPDATE_REQUIRED`)

* Severity

  error

* Introduced in

  WCPOS

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  1.10.3