Updating

Minecraft datapacks are a bit more particular to update across main versions - the server requires a correct datapack in order to be able to boot up properly, so upgrading out-of-order can result in your server being stuck unable to load due to an outdated/incompatible datapack. A few simple, specific steps can avoid this:

Upgrading an existing server to 26.3

1. Install the updated MythicEnchants JAR while still running 1.21.11, 26.1.x, or 26.2.

• If you edited your enchantment YAML, run /mench reload datapack to load those edits.

3. Run /mench datapack prepare 26.3 from the console or as an operator.
4. Stop the server and upgrade Paper and MythicMobs to compatible 26.3 builds.
5. Start the server on 26.3.

prepare regenerates the configured world datapacks from the currently loaded enchantment definitions. It preserves the selected format through subsequent skills, config, and datapack reloads, and through the final regeneration at shutdown. The new server process detects its own Minecraft version as usual.

To cancel before stopping:
Run /mench datapack prepare current. This regenerates the pack using the configured selection, including overlays when enabled. Once explicitly prepared for 26.3, do not restart the previous Minecraft version or use Minecraft's /reload to load that pack on the old version.

Installing a fresh 26.3 server

No special steps needed, just remember to boot your server to install MEnch, then reboot (or /mench datapack validate) to install the datapack!

Troubleshooting

If you encounter issues with version upgrading, such as attempting a server version bump out-of-order, review Troubleshooting Steps for Datapacks or reach out in our Support Discord.