# Recover from filesystem backup: can't rebuild nor start

**URL:** https://meta.discourse.org/t/recover-from-filesystem-backup-cant-rebuild-nor-start/179624
**Category:** Self-hosting
**Created:** [February 14, 2021, 1:46am UTC](https://meta.discourse.org/t/recover-from-filesystem-backup-cant-rebuild-nor-start/179624 "2021-02-14T01:46:30Z")
**Posts on this page:** 1
**Showing post:** 12

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### Author: ![Falco](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/falco/32/179432_2.png) [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [February 14, 2021, 2:26am UTC](https://meta.discourse.org/t/recover-from-filesystem-backup-cant-rebuild-nor-start/179624/12 "2021-02-14T02:26:24Z")

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Oh cool!

So

```plaintext
The source cluster was not shut down cleanly.

```

You will need to follow this

> [@PostgreSQL 13 update](https://meta.discourse.org/t/postgresql-13-update/172563/1):
>
> If you need to postpone the update during your next rebuild, you can swap the PostgreSQL template on your app.yml file by changing `"templates/postgres.template.yml"` to `"templates/postgres.12.template.yml"` .

to start the database without the upgrade first, and then do the update afterwards.

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