# Upgrade to version 7 broken

**URL:** https://community.zammad.org/t/upgrade-to-version-7-broken/19878
**Category:** Technical assistance
**Created:** [March 23, 2026, 9:58pm UTC](https://community.zammad.org/t/upgrade-to-version-7-broken/19878 "2026-03-23T21:58:20Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Olli](https://community.zammad.org/letter_avatar_proxy/v4/letter/o/919ad9/32.png) [@Olli](https://community.zammad.org/u/Olli)
#### Post date: [March 23, 2026, 9:58pm UTC](https://community.zammad.org/t/upgrade-to-version-7-broken/19878/1 "2026-03-23T21:58:20Z")

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### Infos:

- Used Zammad version: 7.0.0-1774248034.c0c8a407.bookworm
- Used Zammad installation type: apt
- Operating system: Debian 12 bookworm

### Expected behavior:

- Working as expected after apt upgrade

### Actual behavior:

- Zammad broken, not starting
- Log says: Error loading the ‘mysql2’ Active Record adapter. Missing a gem it depends on? mysql2 is not part of the bundle. Add it to your Gemfile.

### Steps to reproduce the behavior:

- Using Debian 12, with zammad version 6 + mysql installed by apt package manager.
- Upgrade using: apt upgrade
- Checked this behaviour on 8 systems running the same configuration. System broke after apt upgrade, each time

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### Author: ![MrGeneration](https://community.zammad.org/user_avatar/community.zammad.org/mrgeneration/32/9260_2.png) [@MrGeneration](https://community.zammad.org/u/MrGeneration)
#### Post date: [March 23, 2026, 10:02pm UTC](https://community.zammad.org/t/upgrade-to-version-7-broken/19878/2 "2026-03-23T22:02:04Z")

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Of course, MySQL is no longer part of Zammad.  
It’s been a announced deprecation since Zammad 6.0, roughly 1,5 to 2 years ago.

You’re expected to read the release notes, especially the breaking changes section. Migrate to PostgreSQL before upgrading to Zammad 7.

You can find these information here: [Major release: Zammad 7.0 with AI features](https://zammad.com/en/product/releases/7-0)

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### Author: ![dominikklein](https://community.zammad.org/user_avatar/community.zammad.org/dominikklein/32/8144_2.png) [@dominikklein](https://community.zammad.org/u/dominikklein)
#### Post date: [March 24, 2026, 6:56am UTC](https://community.zammad.org/t/upgrade-to-version-7-broken/19878/3 "2026-03-24T06:56:15Z")

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Yes, announced first time in Zammad 6.0, which was already more than 2 1/2 years ago.