incompatable with version 1.19.4 and 1.20

[No-Git-Tag]

Tested with normal installation of Minecraft. Any world created with v10.0.1/1.19.4 when updated with v10.0.1/1.20.1 on Minecraft 1.20 will fail to load. Prompts user to load world in safe mode then fails with "invalid or corrupted save data."

[Crystalis7]

Hello - I have tried to recreate this with the following steps

• Create a world in 1.19.4 using the datapack version v0.10.1/1.19.4
• Copy it to my 1.20 world saves folder
• Open the world folder, delete the datapack version v0.10.1/1.19.4, and add the datapack version v0.10.1/1.20.1
• Open the world in Minecraft 1.20

Following these steps, I have opened the world without any issues.

I assume you're using the datapack rather than the mod? And are you running any mods on the side?

[No-Git-Tag]

Hello - It was tested on a fresh 1.19.4 and 1.20 instance, but there is a pre-existing 1.19.4 and 1.20 instance that do include many mods.

And yes, i was using the datapack when testing (sorry for the lack of clarity). Am not sure if the modded 1.19.4 and 1.20 instance could affect the vanilla 1.19.4 and 1.20 instance

[Crystalis7]

Do you mean you created the 1.19.4 world on a vanilla instance and then opened it on a vanilla instance of 1.20? The modded instances shouldn't affect the vanilla instances. If you created the world on a modded instance and then moved it to a vanilla one, then there may be some issues.

[No-Git-Tag]

Hello - Yes, The world was made in both vanilla 1.19.4 and 1.20.

I retested with the following steps

1. I created a world in 1.19.4 (vanilla) with datapack version v0.10.1/1.19.4
2. Loaded a few chunks in a ~12*12 range and exited the world
3. Copied the world file onto the saves folder in the 1.20 (vanilla) instance
4. Opened world - Discovery: World can load with the v0.10.1/1.19.4 datapack and v0.10.1/1.20.1 together
5. exited world and deleted the datapack version v0.10.1/1.19.4
6. attempted to enter world with same results as the first test

Difference in second test and first test: Second test was loaded in vanilla 1.20 with both datapacks version v0.10.1/1.20.1 and v0.10.1/1.19.4 while the first one had the datapack version v0.10.1/1.19.4 deleted and replaced with v0.10.1/1.20.1

Results in both tests are the same - The world cannot load with the datapack version v0.10.1/1.20.1

I am sorry if this issue annoys you!

[Crystalis7]

This seems rather odd.

In your first test, do you replace the the datapack version v0.10.1/1.19.4 with version v0.10.1/1.20.1 before you load the world for the first time in 1.20.1, or afterwards? That is the only thing I can think of - if you try and load the world in 1.20.1 with the datapack version v0.10.1/1.19.2, then there will likely be some corruption.

Do you have any further error logs?

And no worries - it is not annoying, rather it is strange that you are getting an error in the first place!

[No-Git-Tag]

I am sorry for the abnormal issue!

Yes, on the first test i have replaced the datapack version v0.10.1./1.19.4 with version v0.10.1/1.20.1 before loading the world in 1.20.1 And there are no error logs that have appeared.

The second test was loaded in 1.20 with both datapacks v0.10.1./1.19.4 and v0.10.1./1.20.1 and thereafter had the datapack version v0.10.1./1.19.4 deleted and still resulted in the world failing to load.

Would there be a way for me to enable logging in any way in relation to the world loading at all?

[Crystalis7]

Just as a control, does this happen if you create a vanilla world (no datapacks) in 1.19.4 and then you try and load it in 1.20?

You could check the logs by keeping the Minecraft Launcher open when you run Minecraft, or by using a third-party client like MultiMC (this is the one I use)

[No-Git-Tag]

Have made a new world without the datapack in 1.19.4 and it does load in 1.20.1

And i use XMCL (X-Minecraft launcher) as my launcher and enabled logs for the 1.20 instance and came with a log

"Missing metadata in pack file/Hybrid.Beta.1.20.1.v0.10.1.zip"

I hope the log can help with something in relation to this issue.

[Crystalis7]

Thank you for the log - it has actually helped me identify a mistake on my part. Did you download the pack from Planet Minecraft or the GitHub releases? If so, I think the version I uploaded there was not constructed correctly. Try downloading it again from Planet Minecraft, Modrinth, or GitHub. I have updated the file, and it should now hopefully work.

[No-Git-Tag]

I am very sure that I have downloaded from the GitHub.

I have tested again with the same steps as always and it now works. Thank you for fixing the issue!