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this world contains invalid save data

1.21.3

Posted December 2, 2024Dec 2

so i switched my world from vanilla to forge then back to vanilla (aternos) and now that error message appeared when i tried to log in, here's the full latest log:

https://mclo.gs/nLfQiHa

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December 2, 2024Dec 2

1 hour ago, The_Hyperdeity said:

so i switched my world from vanilla to forge then back to vanilla

Which would mean we should have a vanilla log, but that's a forge log you posted?

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December 2, 2024Dec 2

Author

35 minutes ago, Ugdhar said:

Which would mean we should have a vanilla log, but that's a forge log you posted?

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yes, my bad, that log was just because i tried to switch back to forge to try and fix the problem, here's the vanilla log: https://mclo.gs/UN4I72R

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December 2, 2024Dec 2

The problem is the save is expecting the mods it was run with, probably due to there being items/blocks/etc in the world from those mods.

Try adding --safeMode to your commandline that runs the server, and see if that works.

[16:45:01] [ServerMain/WARN]: Missing data pack mod:mr_dungeons_andtaverns
[16:45:01] [ServerMain/WARN]: Missing data pack mod:torchbowmod
[16:45:01] [ServerMain/WARN]: Missing data pack mod:the_afterdark
[16:45:01] [ServerMain/WARN]: Missing data pack mod:explorerscompass
[16:45:01] [ServerMain/WARN]: Missing data pack mod:darkloot
[16:45:01] [ServerMain/WARN]: Missing data pack mod:walljump
[16:45:01] [ServerMain/WARN]: Missing data pack mod:terralith
[16:45:01] [ServerMain/WARN]: Missing data pack mod:commonnetworking
[16:45:01] [ServerMain/WARN]: Missing data pack mod:configlibtxf
[16:45:01] [ServerMain/WARN]: Missing data pack mod:forge
[16:45:01] [ServerMain/WARN]: Missing data pack mod:journeymap_api
[16:45:01] [ServerMain/WARN]: Missing data pack mod:geophilic
[16:45:01] [ServerMain/WARN]: Missing data pack mod:collective
[16:45:01] [ServerMain/WARN]: Missing data pack mod:structory
[16:45:01] [ServerMain/WARN]: Missing data pack mod:journeymap
[16:45:01] [ServerMain/WARN]: Missing data pack mod:snowballsfreezemobs
[16:45:01] [ServerMain/WARN]: Missing data pack mod:naturescompass
[16:45:02] [ServerMain/WARN]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode

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December 3, 2024Dec 3

Author

2 hours ago, Ugdhar said:

The problem is the save is expecting the mods it was run with, probably due to there being items/blocks/etc in the world from those mods.

Try adding --safeMode to your commandline that runs the server, and see if that works.

[16:45:01] [ServerMain/WARN]: Missing data pack mod:mr_dungeons_andtaverns
[16:45:01] [ServerMain/WARN]: Missing data pack mod:torchbowmod
[16:45:01] [ServerMain/WARN]: Missing data pack mod:the_afterdark
[16:45:01] [ServerMain/WARN]: Missing data pack mod:explorerscompass
[16:45:01] [ServerMain/WARN]: Missing data pack mod:darkloot
[16:45:01] [ServerMain/WARN]: Missing data pack mod:walljump
[16:45:01] [ServerMain/WARN]: Missing data pack mod:terralith
[16:45:01] [ServerMain/WARN]: Missing data pack mod:commonnetworking
[16:45:01] [ServerMain/WARN]: Missing data pack mod:configlibtxf
[16:45:01] [ServerMain/WARN]: Missing data pack mod:forge
[16:45:01] [ServerMain/WARN]: Missing data pack mod:journeymap_api
[16:45:01] [ServerMain/WARN]: Missing data pack mod:geophilic
[16:45:01] [ServerMain/WARN]: Missing data pack mod:collective
[16:45:01] [ServerMain/WARN]: Missing data pack mod:structory
[16:45:01] [ServerMain/WARN]: Missing data pack mod:journeymap
[16:45:01] [ServerMain/WARN]: Missing data pack mod:snowballsfreezemobs
[16:45:01] [ServerMain/WARN]: Missing data pack mod:naturescompass
[16:45:02] [ServerMain/WARN]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode

yeah but here's the thing; i didn't get into the world with the mods on, i realized i had to have the mods installed on the client and reverted it back to vanilla, and even then i tried to boot it up on safe mode in vanilla, still didn't work.

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December 3, 2024Dec 3

Not really sure what you can do if the --safeMode doesn't work, to be honest. Evidently just starting the server (I assume you ran it once you added forge/mods) was enough to embed those datapacks into your save.

Hopefully there's something that can be done for you, and someone will chime in with a solution!

Good luck!

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December 3, 2024Dec 3

It is possible to delete these registries/entries from the level.dat via NBT Editor

https://github.com/jaquadro/NBTExplorer

Try my Modpack

>>Link to Curseforge<<

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December 4, 2024Dec 4

Author

didn't work, crashed anyway😔

On 12/3/2024 at 4:27 AM, TileEntity said:

It is possible to delete these registries/entries from the level.dat via NBT Editor

https://github.com/jaquadro/NBTExplorer

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By AidenJules_ · Posted 1 hour ago1 hr
[1.21.3] How to add effects to food?

game changed the way you create foods.
for example minecraft 1.21.8 code for the golden apple is

Foods.java
public static final FoodProperties GOLDEN_APPLE = new FoodProperties.Builder().nutrition(4).saturationModifier(1.2F).alwaysEdible().build();

Items.java
public static final Item GOLDEN_APPLE = registerItem("golden_apple", new Item.Properties().food(Foods.GOLDEN_APPLE, Consumables.GOLDEN_APPLE));

Consumables.java
public static final Consumable GOLDEN_APPLE = defaultFood() .onConsume( new ApplyStatusEffectsConsumeEffect( List.of(new MobEffectInstance(MobEffects.REGENERATION, 100, 1), new MobEffectInstance(MobEffects.ABSORPTION, 2400, 0)) ) )

By LordCambion · 16 hours ago16 hr
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hello everyone..!

By WinX · 22 hours ago22 hr
How to add my mob to another mod's biome in 1.20.1.

tysm

By ilov3gam3z · Friday at 06:05 PM1 day
Orbital strike cannon fishing rod mod

was focused on school so didnt respond u think ur gonna get 1.21+ done by this week? @FoxyWoxy

By Astoxy · Friday at 11:09 AM1 day

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this world contains invalid save data

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