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Update | 1.21.11 to 26.1.2

This guide explains how to update any of our Premium setups from 1.21.11 to 26.1.2. If your setup is currently on 1.21.11, this is the guide you should follow.

Update released: 12th July 2026

Start by downloading the latest version of the setup you are using on BuiltByBit.

Before completing all the step below, please STOP your server to avoid any file corruption!

1. Updating the JAR

The first step is to update your server JAR. We recommend using Paper, so make sure to update to the latest 26.1.2 version of PaperMC: https://papermc.io/

2. Updating the Plugins

The next step is to update all plugins in the setup. The easiest way is to download the latest version of your setup from BuiltByBit. Then, delete the existing plugins on your server (except for any you added yourself) and upload the plugins from the latest setup version.

You also have to update all dependencies.

3. Migrating to new world format

From the 26.1 update, PaperMC have changed how they save worlds by putting all dimensions inside the main world folder.

The Multiverse-Core plugin should migrate this automatically on the first startup on 26.1.2. But you should save a backup of your world folders before updating.

4. Updating the Resourcepack

The Minecraft 26.1.2 update forced us to change how the custom 2D Head texture works. For this reason, you have to update the resourcepack on your server.

By default, our setups use the ForcePack plugin to handle the resourcepack. In this case, simply update the config.yml by replacing the file on your server at: plugins > ForcePack > config.yml with the one from the latest version of the setup.

If you’re using ItemsAdder or Nexo, download the latest version of our premade folder for ItemsAdder/Nexo here:

5. Updating the Skript files

In a recent update of the Skript plugin, the WorldGuard integration within the Skript plugin was removed and a new skript-worldguard addon has been released. You can download the plugin below to install it on your server.

skript-worldguard-1.0.1.jar
92KB
Open

Below are all the Skript files that need to be updated to support Skript 2.15.3. Delete these files at this filepath and replace them with the same ones from the latest version of the setup: plugins > Skript > scripts

  • afk.sk

  • jumppad.sk

  • linkdiscord.sk

  • linkstore.sk

  • linkvote.sk

  • motd.sk

  • titles.sk

  • (rpgclasse.sk, rpggtmayor.sk, rpggtmobs from the RPG Addon)

  • (all Skript files from the Dungeons Addon)

6. Migrating from CoinsEngine to ExcellentEconomy

In a recent update, the CoinsEngine plugin was renamed to ExcellentEconomy. Follow these setups to migrate from CoinsEngine to ExcellentEconomy:

  1. Delete the CoinsEngine JAR on your server and upload the ExcellentEconomy JAR from the latest version of the setup.

  2. Rename your CoinsEngine plugins folder to ExcellentEconomy.

  3. Change all coinsengine_balance placeholders on your server to excellenteconomy_balance. The easiest way to do this is to use a Replace In All Files tool founds in apps like VSCode.

7. Migrating from Themis to GrimAC

In the 26.1.2 update of our setups, we have decided to switch from Themis to GrimAC as the anticheat plugin in the setup.

The migrate, simply delete the Themis plugin JAR and folder on your server, and upload the GrimAC JAR from the latest version of the setup.

8. Updating ChatGames

The ChatGames configuration used in our setups has to be adapted to work on 26.1.2. To do so, simply replace the files at this filepath with the same files from the latest version of the setup:

  • plugins > ChatGames > config.yml

  • plugins > ChatGames > messages.yml

9. Updating Citizens

A minor syntax change was made in a recent update of Citizens, to the LookClose trait. To fix this, replace every instance of range: '5.0' with range: 5.0 in the file at this filepath: plugins > Citizens > saves.yml.

10. Other changes required for each setup/addon

Premium Skyblock Setup

SellWands > AxSellWands:

  • The SellWands plugin used in the setup does not support 26.1.2. Therefore we have migrated to use the AxSellWands plugin. To apply this change, simply delete the SellWands plugin on your server and upload the new AxSellWands JAR and plugins folder from the latest version of the setup.

Dungeons Addon

Updating MythicMobs:

  • A small syntax change was made to the command drop setting in MythicMobs. To fix this, you can just delete the MythicMobs files from the Dungeons Addon on your server and replace them with the latest ones from the Dungeons Addon.

Updating CommandTimer:

  • A lot of syntax changes was made to the CommandTimer plugin. We recommend to just delete the CommandTimer plugins folder on your server, and replace it with the CommandTimer plugins folder from the latest version of the Dungeons Addon.

RPG Addon

Updating MythicMobs:

  • A small syntax change was made to the command drop setting in MythicMobs. To fix this, you can just delete the MythicMobs files from the RPG Addon on your server and replace them with the latest ones from the RPG Addon.

Updating CommandTimer:

  • A lot of syntax changes was made to the CommandTimer plugin. We recommend to just delete the CommandTimer plugins folder on your server, and replace it with the CommandTimer plugins folder from the latest version of the Dungeons Addon.

Update Completed

You’ve finished all steps. If anything isn’t working as expected, please contact us on Discord.

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