<p>Replace the <code>/app</code> folder, per the <a href="https://craftcms.com/docs/updating#manually-updating" rel="nofollow">Manual Update</a> instructions. It sounds like you may have already done this, but rolled it back.</p>

<p>Once the new <code>/app</code> folder is in place, <strong>you must visit the admin section</strong>. This will run any necessary migrations.</p>

<p>That's it!</p>

CC BY-SA 3.0
2016-09-17T17:19:08.120Z
2016-09-17T17:19:08.120Z
Lindsey D
<p>Did you backup the database before trying to install the new version? </p>

<p>The new update might have messed something up with the DB so the previous version isn't working with the old version of <code>/app</code>. So you might want to try re-add the old DB and previous version of <code>/app</code>.</p>

CC BY-SA 3.0
2016-09-17T16:34:34.083Z
2016-09-17T16:34:34.083Z
Kenyon Kowal
<p>Thank you all for your thoughts, pushed me into th right direction. </p>

<p>There was a mismatch between the db version and the app/ folder version. 
I took the latest SQL backup and downloaded the corresponding Craft CDN repository installation. Imported the SQL backup into the database, and uploaded the corresponding app/ folder. </p>

<p>After checking all functionallity updated to the latest build. All is working as expected again !</p>

<p>-R</p>

CC BY-SA 3.0
2016-09-18T13:01:07.547Z
2016-09-18T13:01:07.547Z
rdhrkns
<p>After uploading the app-new folder to my server, renaming it and logging in to the admin area. The website responds with a 'System not available message' (in Dutch) for both front and admin end.</p>

<p><a href="https://i.sstatic.net/wCRbf.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/wCRbf.png" alt="enter image description here"></a></p>

<p>Resetting the app-old as the default app folder again does not solve the error message. I've cleared the <code>storage/runtime/cache</code> and <code>storage/runtime/compiled_templates</code> folder. </p>

<p>What actions are needed to restore the site to working order first, before going into the update again?</p>

<updates><manual-updates>
Manual update to 2.6.2931
# Manual update to 2.6.2931

(Asked by: username_0 on 2016-09-17)

After uploading the app-new folder to my server, renaming it and logging in to the admin area. The website responds with a 'System not available message' (in Dutch) for both front and admin end.

[![enter image description here](https://i.sstatic.net/wCRbf.png)](https://i.sstatic.net/wCRbf.png)

Resetting the app-old as the default app folder again does not solve the error message. I've cleared the `storage/runtime/cache` and `storage/runtime/compiled_templates` folder.

What actions are needed to restore the site to working order first, before going into the update again?

**Tags:** updates, manual-updates

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## 3 answers

### Answer by username_1 on 2016-09-17. Score: 3

Replace the `/app` folder, per the [Manual Update](https://craftcms.com/docs/updating#manually-updating) instructions. It sounds like you may have already done this, but rolled it back.

Once the new `/app` folder is in place, **you must visit the admin section**. This will run any necessary migrations.

That's it!


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### Answer by username_2 on 2016-09-17. Score: 1

Did you backup the database before trying to install the new version?

The new update might have messed something up with the DB so the previous version isn't working with the old version of `/app`. So you might want to try re-add the old DB and previous version of `/app`.


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### Answer by username_0 on 2016-09-18. Score: 1

Thank you all for your thoughts, pushed me into th right direction.

There was a mismatch between the db version and the app/ folder version.
I took the latest SQL backup and downloaded the corresponding Craft CDN repository installation. Imported the SQL backup into the database, and uploaded the corresponding app/ folder.

After checking all functionallity updated to the latest build. All is working as expected again !

-R


---

