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Resources / Tools & other / FAUNA Memory Fix

FAUNA Memory Fix

Unofficial data pack that stops FAUNA creatures, including Book of Dragons dragons, from forgetting the players taming them and their packmates. Raises…

Tools & otherFree1.20 – 1.21
by AjMaveric · listed from Modrinth
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Direct download from Modrinth · 1 downloads

What it does

FAUNA Memory Fix is a resource made by AjMaveric. Unofficial data pack that stops FAUNA creatures, including Book of Dragons dragons, from forgetting the players taming them and their packmates. Raises…

It supports Minecraft 1.20 – 1.21. It has been downloaded 1 times on Modrinth. The last update came out on Nov 14, 2026.

Supported versions

1.211.20

Release history

The newest is 1.0.0, released on Nov 14, 2026. It is made for Minecraft 1.20.1, 1.21.1. It runs on Data pack. The download is 1 KB.

VersionReleasedMinecraftType
1.0.0Nov 14, 20261.20.1, 1.21.1Release
Description from the author on Modrinth

FAUNA Memory Fix (unofficial)

A one-file data pack that stops creatures built on FAUNA Engine, including every Book of Dragons dragon, from forgetting the players taming them and the dragons they live with.

The problem

FAUNA gives each creature an active memory of the individuals it knows. Once that list passes 32, the creature starts filing entries into long-term memory to make room. In a busy world the list fills up with mobs it has met (skeletons, zombies, creepers, wild dragons) that it can neither file nor forget, so it files the ones it can: the player taming it, or its packmates.

What you see:

  • The book's relations page drops to familiarity 0, fear 0 and liking 0 for someone the creature knew.
  • Taming stalls. Taming only reads active memory, so the dragon stops asking you for anything, or loses its progress.
  • Tamed dragons treat their packmates as strangers again.

The fix

The pack raises FAUNA's recent_rows memory setting from 32 to 128, so filing doesn't start until a creature knows far more individuals. Nothing else changes. Entries that were already filed come back the next time the creature sees that player or dragon.

It applies to every FAUNA creature, wild or tamed. It doesn't change how many dragons you can tame or own.

Install

  • One world: put the zip in saves//datapacks/, then reopen the world, or run /reload with cheats on.
  • Every world: with Open Loader, put the zip in config/openloader/data/. With KubeJS, copy data/faunaengine/fauna/memory.json from the zip to kubejs/data/faunaengine/fauna/memory.json.
  • Server: put the zip in the server world's datapacks folder.

Versions

One zip works on Minecraft 1.20.1 and 1.21.1, on Forge and NeoForge, with FAUNA Engine 1.2. A later FAUNA update may fix or rename this setting, so check the changelog before relying on it.

Credits

Not affiliated with FAUNA Engine or Book of Dragons. This is a workaround until the bug is fixed upstream. FAUNA Engine: modrinth.com/mod/fauna-engine

Written by AjMaveric. Read it with pictures on Modrinth.

Compatibility

Minecraft versions
1.21, 1.20
Edition
Java
Needs
FAUNA Engine
License
MIT
Price
Free
Upkeep
Actively updated (Nov 15, 2026)

FAUNA Memory Fix compared with similar ones Compare all alternatives

ResourceDownloadsVersionsLast updatePrice
FAUNA Memory Fixthe one you looked at11.20 – 1.2112 hours agoFree
Better Sulfur CavesDemontherite726.x2 days agoFree
Avarii FortressSkyArchitec1391.20 – 26.x2 days agoFree
Better Swamp and MangroveDemontherite426.x2 days agoFree

Questions

Does FAUNA Memory Fix work on Minecraft 26.x?

Not yet. The newest version it supports is Minecraft 1.21.

Is FAUNA Memory Fix free?

Yes. FAUNA Memory Fix is free to download from Modrinth.

Does FAUNA Memory Fix need anything else?

Yes: FAUNA Engine. Install it before FAUNA Memory Fix.

Is FAUNA Memory Fix still updated?

Yes. The last update came out in the past day.

What are the best alternatives to FAUNA Memory Fix?

The closest ones are Better Sulfur Caves, Avarii Fortress and Better Swamp and Mangrove. Compare all alternatives

Alternatives to FAUNA Memory Fix

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