> For the complete documentation index, see [llms.txt](https://docs.ohalee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ohalee.com/products/modern-oneblock/upgrading.md).

# Upgrading from 1.0.8

## What changed

<table><thead><tr><th width="200">​</th><th width="240">Before</th><th>Now</th></tr></thead><tbody><tr><td>Minecraft</td><td>1.21.x</td><td><strong>26.1+</strong></td></tr><tr><td>Java</td><td>21</td><td><strong>25</strong></td></tr><tr><td>Plugin name</td><td>OneBlock</td><td><strong>ModernOneBlock</strong></td></tr><tr><td>Data folder</td><td><code>plugins/OneBlock/</code></td><td><strong><code>plugins/ModernOneBlock/</code></strong></td></tr><tr><td>Jar</td><td><code>UltimateOneBlock-2.0.0.jar</code></td><td><code>ModernOneBlock-26.1.0.jar</code></td></tr><tr><td>Folia</td><td>not supported</td><td><strong>supported</strong></td></tr></tbody></table>

## Your data folder is moved for you

On first start the plugin looks for `plugins/OneBlock/` and moves it to `plugins/ModernOneBlock/`, carrying your configuration, your edited language files and the H2 island database with it. If the new folder already exists it is left alone. If the move fails, the plugin copies instead and tells you in the console — the old folder is never deleted.

{% hint style="warning" %}
The database schema is migrated automatically, and only forward. Take a backup of `oneblock-db-h2.mv.db` (or your MariaDB database) before the first start anyway: a failed migration aborts startup rather than leaving a half-built schema.
{% endhint %}

## VoidGen is no longer required

The islands world is generated by a bundled void generator. You can uninstall VoidGen.

## What deliberately did not change

Servers depend on these, so they were left alone:

* Permission nodes are still `oneblock.*`.
* The islands world is still `islands`.
* `/is`, `/ob` and `/oneblock` are unchanged.
* Generator items keep their `oneblock:` data keys — existing placed generators still work.

## Version numbering

Versions are now `<mc-major>.<mc-drop>.<release>`. The first two segments are the oldest Minecraft drop a build supports, so `26.1.0` is the first release for Minecraft 26.1. A build that required 26.2 would be `26.2.0`.

## New config files

Three additions appear on first start. Existing files are never overwritten.

* `worth.yml` — item sell prices and block worth for island value.
* `upgrades.yml` — island upgrade tiers and costs.
* New sections in `config.yml`: `island-flags`, `tops.holograms`, `text-format`.

## New permissions

All default to `true`:

`oneblock.bank`, `oneblock.shop`, `oneblock.upgrades`, `oneblock.flags`, `oneblock.sethome`, `oneblock.warp`, `oneblock.top`.

Every `oneblock.*` node is now declared in `plugin.yml`, so permission plugins can finally see them.

## Known limitations

* **Island value is incremental.** It counts blocks placed and broken while the plugin is running, so blocks already standing before a `worth.yml` entry existed are not counted.
* **The hopper limit is per chunk**, not per island.
* **On Folia the mob limit is skipped** when an island's bounding box spans regions.
* **On Folia, island holograms are not removed at shutdown.** The bundled provider's holograms are non-persistent and do not survive the restart either way.