Can't Start Server after Update to MC 1.20.1

[skelso01]

Issue description: I created a own ModPack. After updateing my ModPack to Minecraft 1.20.1 my Server is crashing. If I try to start the Server with a new created world, everything is fine. If I try to start the server with my already created Map from Minecraft 1.19.1, then my server crashes.

Steps to reproduce:

1. Create new curseforge server on linux
2. unpack my modpack server package
3. copy the old world of Minecraft 1.19.1 to the new ModPack folder
4. start the 1.20.1

Versions:

• Minecraft: 1.20.1
• Forge: 47.2.20
• McJtyLib: 8.0.3
• RFTools: 5.0.2
• RFTools Dimensions: 11.0.5

Possibly incompatible mods: don't know

Relevant logs, if any: [04:47:27] [main/WARN] [minecraft/Main]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode java.util.concurrent.ExecutionException: java.util.NoSuchElementException: No value present at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396) ~[?:?] {re:mixin} at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2073) ~[?:?] {re:mixin} at net.minecraft.server.Main.main(Main.java:195) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:mixin,re:classloading,pl:mixin:A} at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {} at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {} at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {} at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {} at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111) ~[fmlloader-1.20.1-47.2.20.jar%2369!/:?] {} at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.serverService(CommonLaunchHandler.java:103) ~[fmlloader-1.20.1-47.2.20.jar%2369!/:?] {} at net.minecraftforge.fml.loading.targets.CommonServerLaunchHandler.lambda$makeService$0(CommonServerLaunchHandler.java:27) ~[fmlloader-1.20.1-47.2.20.jar%2369!/:?] {} at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.9.jar%2355!/:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.9.jar%2355!/:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.9.jar%2355!/:?] {} at cpw.mods.modlauncher.Launcher.run(Launcher.java:108) ~[modlauncher-10.0.9.jar%2355!/:?] {} at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar%2355!/:?] {} at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar%2355!/:?] {} at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar%2355!/:?] {} at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] {} Caused by: java.util.NoSuchElementException: No value present at java.util.Optional.get(Optional.java:143) ~[?:?] {re:mixin} at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?] {} at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?] {} at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) ~[?:?] {} at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?] {} at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {} at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?] {} at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {} at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[?:?] {} at mcjty.rftoolsdim.dimension.biomes.RFTBiomeProvider.getBiomes(RFTBiomeProvider.java:151) ~[rftoolsdim-1.20-11.0.5.jar%23252!/:1.20-11.0.5] {re:classloading} at mcjty.rftoolsdim.dimension.biomes.RFTBiomeProvider.(RFTBiomeProvider.java:54) ~[rftoolsdim-1.20-11.0.5.jar%23252!/:1.20-11.0.5] {re:classloading} at com.mojang.serialization.DataResult$Instance.ap3(DataResult.java:340) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$5.decode(RecordCodecBuilder.java:321) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$3(KeyDispatchCodec.java:67) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$4(KeyDispatchCodec.java:58) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.KeyDispatchCodec.decode(KeyDispatchCodec.java:56) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.lambda$compressedDecode$1(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$5.decode(RecordCodecBuilder.java:322) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$3(KeyDispatchCodec.java:67) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.KeyDispatchCodec.lambda$decode$4(KeyDispatchCodec.java:58) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.KeyDispatchCodec.decode(KeyDispatchCodec.java:56) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.lambda$compressedDecode$1(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.lambda$compressedDecode$1(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at net.minecraftforge.common.LenientUnboundedMapCodec.lambda$decode$3(LenientUnboundedMapCodec.java:52) ~[forge-1.20.1-47.2.20-universal.jar%23286!/:?] {re:classloading} at java.util.stream.ReduceOps$1ReducingSink.accept(ReduceOps.java:80) ~[?:?] {} at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?] {} at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1707) ~[?:?] {} at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?] {} at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {} at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[?:?] {} at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {} at java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:667) ~[?:?] {} at net.minecraftforge.common.LenientUnboundedMapCodec.decode(LenientUnboundedMapCodec.java:48) ~[forge-1.20.1-47.2.20-universal.jar%23286!/:?] {re:classloading} at net.minecraftforge.common.LenientUnboundedMapCodec.lambda$decode$8(LenientUnboundedMapCodec.java:70) ~[forge-1.20.1-47.2.20-universal.jar%23286!/:?] {re:classloading} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at net.minecraftforge.common.LenientUnboundedMapCodec.decode(LenientUnboundedMapCodec.java:70) ~[forge-1.20.1-47.2.20-universal.jar%23286!/:?] {re:classloading} at com.mojang.serialization.Decoder$2.decode(Decoder.java:63) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.Codec$2.decode(Codec.java:71) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.Decoder.parse(Decoder.java:18) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.FieldDecoder.decode(FieldDecoder.java:29) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapCodec$1.decode(MapCodec.java:34) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$1.decode(RecordCodecBuilder.java:183) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:249) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.lambda$compressedDecode$1(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.lambda$flatMap$11(DataResult.java:139) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.DataResult.flatMap(DataResult.java:137) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.Decoder.decode(Decoder.java:22) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at com.mojang.serialization.Decoder.parse(Decoder.java:26) ~[datafixerupper-6.0.8.jar%2377!/:?] {} at net.minecraft.world.level.storage.LevelStorageSource.m247212(LevelStorageSource.java:129) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:classloading} at net.minecraft.world.level.storage.LevelStorageSource.m264027(LevelStorageSource.java:244) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:classloading} at net.minecraft.world.level.storage.LevelStorageSource.m230817(LevelStorageSource.java:202) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:classloading} at net.minecraft.world.level.storage.LevelStorageSource$LevelStorageAccess.m246049(LevelStorageSource.java:439) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:mixin,re:classloading} at net.minecraft.server.Main.lambda$main$1(Main.java:170) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:mixin,re:classloading,pl:mixin:A} at net.minecraft.server.WorldLoader.m214362(WorldLoader.java:35) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:classloading} at net.minecraft.server.Main.lambda$main$2(Main.java:167) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:mixin,re:classloading,pl:mixin:A} at net.minecraft.Util.m214652(Util.java:777) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:mixin,re:classloading,pl:mixin:APP:ftbchunks-common.mixins.json:UtilMixin,pl:mixin:A} at net.minecraft.Util.m214679(Util.java:772) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:mixin,re:classloading,pl:mixin:APP:ftbchunks-common.mixins.json:UtilMixin,pl:mixin:A} at net.minecraft.server.Main.main(Main.java:166) ~[server-1.20.1-20230612.114412-srg.jar%23281!/:?] {re:mixin,re:classloading,pl:mixin:A} ... 15 more

[McJty]

Are you trying to update a running server to a newer version of MC? Or what exactly? Not sure I understand

[skelso01]

Yes. I Updated our ModPack from Minecraft Version 1.19.2 to 1.20.2 The on using the existing World, the server crashes on start. If I start the server with creating a new world and not use the existing one, everything is fine

[McJty]

That's not possible. You cannot upgrade a modded server between Minecraft versions. This is simply not doable

[McJty]

BTW, that's not only possible because of RFTools Dimensions. Most mods don't allow this kind of upgrade

[skelso01]

Hm, so far we've never had any problems with map upgrades to a new Minecraft version. However, I have to admit that this is the first time we've used RFTools for a Minecraft version update.