---
# System prepended metadata

title: How to backport from alpha to mumbai

---

# How to backport from alpha to mumbai

First, get the commit of your merge request and the latest merge:
```bash
$ git log master
commit 71aeefba399a9c5a97b94b0fb0426638186dba93 (tezos/master, master)
Merge: a345523ba3 89b042aa12
Author: Marge Bot <marge-bot@nomadic-labs.com>
Date:   Mon Dec 12 14:24:12 2022 +0000

    Merge tezos/tezos!7109: Scoru,Proto: removes redundant [level_proof] field
    
    Co-authored-by: Valentin Chaboche <valentin.chaboche@nomadic-labs.com>
    
    Approved-by: Yann Regis-Gianas <946787-yrg@users.noreply.gitlab.com>
    Approved-by: Pierrick Couderc <pierrick.couderc@nomadic-labs.com>
    
    See merge request https://gitlab.com/tezos/tezos/-/merge_requests/7109

commit 89b042aa127333171c995b111ec552663e44727c
Author: Valentin Chaboche <valentin.chaboche@nomadic-labs.com>
Date:   Fri Dec 9 23:10:04 2022 +0100

    Scoru,Proto: removes redundant [level_proof] field

commit a345523ba3e416268bbecae9fd3a2293c25ce74f
Merge: 6fbacfffd5 19f3e63c5c
Author: Marge Bot <marge-bot@nomadic-labs.com>
Date:   Mon Dec 12 13:57:42 2022 +0000

    Merge tezos/tezos!7107: WASM: Restrict reading from and writing to durable storage
    
    Co-authored-by: Thomas Letan <lthms@nomadic-labs.com>
    
    Approved-by: Emma Turner <1623821-emturner@users.noreply.gitlab.com>
    Approved-by: Pierrick Couderc <pierrick.couderc@nomadic-labs.com>
    
    See merge request https://gitlab.com/tezos/tezos/-/merge_requests/7107

```

For example, my goal is to backport !7109. So I'll get the diff of my merge request:

```bash
git format-patch 71aeefba399a9c5a97b94b0fb0426638186dba93 a345523ba3e416268bbecae9fd3a2293c25ce74f --stdout > patch_on_alpha.diff
```

Then you move the patch from Alpha to Mumbai:
```bash
sed 's/proto\_alpha/proto_016_PtMumbai/g' patch_on_alpha.diff > patch_on_mumbai.diff
```

Apply the patch and add the necessary diffs.
```bash
git apply patch_on_mumbai.diff
```

Finally create a merge request targeting the branch `mumbai`