General Discussion

Rubidium and Embeddium are versions of the same mod, you can only have one. I believe Embeddium is the one that's actively maintained.

Hello, New to modding, but have a solid CS foundation. I've created multiple custom BlockEntities that all have the same issue, which is that the inventory only updates on right click (overriding the useItemOn method). I've seen multiple posts on here outlining a similar issue to mine, but I've already implemented the solution of: overriding the correct methods in the BlockEntity class and calling setChanged(). I've tried every different place for setChanged() to no success. I'm wondering if I'm missing something else or if there was some change to sending data to the client in 1.21.5? Or will I have to use a custom packet sender? Here is the code for one of my BlockEntity classes with a single inventory slot: public class MyCustomBlockEntity extends BlockEntity { public final ItemStackHandler inventory = new ItemStackHandler(1) { @Override protected int getStackLimit(int slot, @NotNull ItemStack stack) { return 1; } @Override protected void onContentsChanged(int slot) { setChanged(); if (!level.isClientSide()) { level.setBlockAndUpdate(getBlockPos(), getBlockState()); } } }; public MyCustomBlockEntity(BlockPos pPos, BlockState pBlockState) { super(ModBlockEntities.MY_CUSTOM_BE.get(), pPos, pBlockState); } public void clearContents() { inventory.setStackInSlot(0, ItemStack.EMPTY); } public void dropItem() { SimpleContainer inv = new SimpleContainer(inventory.getSlots()); inv.setItem(0, inventory.getStackInSlot(0)); Containers.dropContents(this.level, this.worldPosition, inv); } @Override public void setRemoved() { dropItem(); super.setRemoved(); } @Override protected void saveAdditional(CompoundTag pTag, HolderLookup.Provider pRegistries) { super.saveAdditional(pTag, pRegistries); pTag.put("inventory", inventory.serializeNBT(pRegistries)); } @Override protected void loadAdditional(CompoundTag pTag, HolderLookup.Provider pRegistries) { super.loadAdditional(pTag, pRegistries); inventory.deserializeNBT(pRegistries, pTag.getCompound("inventory").get()); } @Override public Packet<ClientGamePacketListener> getUpdatePacket() { return ClientboundBlockEntityDataPacket.create(this); } @Override public CompoundTag getUpdateTag(HolderLookup.Provider pRegistries) { return saveWithoutMetadata(pRegistries); } } Mostly encountering the issue when calling the clearContents() method anywhere outside of useItemOn() in the Block class. I've also tried overriding both the handleUpdateTag() and onDataPacket() methods, calling their super along with loadAdditional(), but neither changed the outcome. Thanks in advance for any replies.

Hi all! I’m working on a Jurassic Park-themed mod for Minecraft 1.20.1, aiming to include dinosaurs, fossils, DNA extraction, and cool machines. This is a free project, mainly passion-driven, and I’ll give full credit to everyone involved. this is the perfect opportunity for beginners of modeling and coding. This project will give you experience and a creative freedom If you love dinosaurs and Minecraft modding, hit me up! Thanks! Add Me ogfrost. <--- Discord

I'm just really confused. This bug only applies to modpacks made by me. i have tried using different launchers prism, modrinth etc. I have tried with multiple modpacks. All of this has not prevented this bug. Relevant part of log is here: [06Jun2025 16:18:49.882] [main/ERROR] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Failed to build unique mod list after mod discovery. net.minecraftforge.fml.loading.EarlyLoadingException: Duplicate mods found     at net.minecraftforge.fml.loading.UniqueModListBuilder.buildUniqueList(UniqueModListBuilder.java:87) ~[loader-47.2.2.jar:47.2]     at net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer.discoverMods(ModDiscoverer.java:106) ~[loader-47.2.2.jar:47.2]     at net.minecraftforge.fml.loading.FMLLoader.beginModScan(FMLLoader.java:164) ~[loader-47.2.2.jar:47.2]     at net.minecraftforge.fml.loading.FMLServiceProvider.beginScanning(FMLServiceProvider.java:86) ~[loader-47.2.2.jar:47.2]     at cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:112) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$8(TransformationServicesHandler.java:100) ~[modlauncher-10.0.9.jar:?]     at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]     at java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1779) ~[?:?]     at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]     at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]     at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) ~[?:?]     at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?]     at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) ~[?:?]     at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622) ~[?:?]     at java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627) ~[?:?]     at cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:102) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:55) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.Launcher.run(Launcher.java:88) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?]     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 io.github.zekerzhayard.forgewrapper.installer.Main.main(Main.java:67) ~[?:?]     at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105) ~[?:?]     at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129) ~[?:?]     at org.prismlauncher.EntryPoint.main(EntryPoint.java:70) ~[?:?] [06Jun2025 16:18:49.894] [main/ERROR] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Mod Discovery failed. Skipping dependency discovery.     Full log [06Jun2025 16:18:48.612] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, DeltaBlack_, --version, 1.20.1, --gameDir, C:/Users/sammi/AppData/Roaming/PrismLauncher/instances/SITE 111/minecraft, --assetsDir, C:/Users/sammi/AppData/Roaming/PrismLauncher/assets, --assetIndex, 5, --uuid, 0ff86c0727f444f1a926b954a58d8c44, --accessToken, ????????, --userType, msa, --versionType, release, --launchTarget, forgeclient, --fml.forgeVersion, 47.1.105, --fml.fmlVersion, 47.2.2, --fml.mcVersion, 1.20.1, --fml.mcpVersion, 20230612.114412, --width, 854, --height, 480] [06Jun2025 16:18:48.615] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 10.0.9+10.0.9+main.dcd20f30 starting: java version 17.0.8 by Microsoft; OS Windows 11 arch amd64 version 10.0 [06Jun2025 16:18:49.050] [main/INFO] [net.minecraftforge.fml.loading.ImmediateWindowHandler/]: Loading ImmediateWindowProvider fmlearlywindow [06Jun2025 16:18:49.173] [main/INFO] [EARLYDISPLAY/]: Trying GL version 4.6 [06Jun2025 16:18:49.311] [main/INFO] [EARLYDISPLAY/]: Requested GL version 4.6 got version 4.6 [06Jun2025 16:18:49.496] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.5 Source=union:/C:/Users/sammi/AppData/Roaming/PrismLauncher/libraries/org/spongepowered/mixin/0.8.5/mixin-0.8.5.jar%23152!/ Service=ModLauncher Env=CLIENT [06Jun2025 16:18:49.502] [pool-2-thread-1/INFO] [EARLYDISPLAY/]: GL info: AMD Radeon Graphics GL version 4.6.0 Core Profile Context 24.10.21.03.240627, ATI Technologies Inc. [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "[1.20.1] SecurityCraft v1.10.0.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "ad_astra-forge-1.20.1-1.15.20.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "architectury-9.2.14-forge.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "bellsandwhistles-0.4.5-1.20.x-Create6.0+.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "botarium-forge-1.20.1-2.3.4.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "chloride-FORGE-mc1.20.1-v1.7.2.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "copycats-3.0.1+mc.1.20.1-forge.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "Create Encased-1.20.1-1.7.1-fix2.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "create-1.20.1-6.0.4.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "create_enchantment_industry-1.3.2-for-create-6.0.4.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.713] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "create_security-0.1.2-forge-1.20.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.714] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "createdeco-2.0.3-1.20.1-forge.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.714] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "createframed-1.20.1-1.6.5.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.714] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "creategoggles-1.20.1-6.0.0-[FORGE].jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "Crystal-Clear-2.1-Beta-forge.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "design_decor-0.4.0b-1.20.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "embeddium-0.3.31+mc1.20.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "entityculling-forge-1.7.4-mc1.20.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "interiors-0.5.6+forge-mc1.20.1-local.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "Jade-1.20.1-Forge-11.13.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "jei-1.20.1-forge-15.20.0.112.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "ManyIdeasCore-1.20.1-1.4.2.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "ManyIdeasDoors-1.20.1-1.2.3.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "prma-1.20.1-0.4.4-cr6.0-SIMPLE-beta-all.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.715] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "RecipesLibrary-1.20.1-2.0.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "resourcefulconfig-forge-1.20.1-2.1.3.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "resourcefullib-forge-1.20.1-2.1.29.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "rubidium-extra-0.5.4.4+mc1.20.1-build.131.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "rubidium-mc1.20.1-0.7.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "skinlayers3d-forge-1.7.5-mc1.20.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "Steam_Rails-1.6.7+forge-mc1.20.1.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "tacz-1.20.1-1.1.5.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "Xaeros_Minimap_25.2.6_Forge_1.20.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.716] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "XaerosWorldMap_1.39.9_Forge_1.20.jar" of type MOD with provider {mods folder locator at C:\Users\sammi\AppData\Roaming\PrismLauncher\instances\SITE 111\minecraft\mods} [06Jun2025 16:18:49.853] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\sammi\AppData\Roaming\PrismLauncher\libraries\net\neoforged\fancymodloader\core\47.2.2\core-47.2.2.jar is missing mods.toml file [06Jun2025 16:18:49.856] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\sammi\AppData\Roaming\PrismLauncher\libraries\net\neoforged\fancymodloader\language-java\47.2.2\language-java-47.2.2.jar is missing mods.toml file [06Jun2025 16:18:49.858] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\sammi\AppData\Roaming\PrismLauncher\libraries\net\neoforged\fancymodloader\language-lowcode\47.2.2\language-lowcode-47.2.2.jar is missing mods.toml file [06Jun2025 16:18:49.861] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\sammi\AppData\Roaming\PrismLauncher\libraries\net\neoforged\fancymodloader\language-minecraft\47.2.2\language-minecraft-47.2.2.jar is missing mods.toml file [06Jun2025 16:18:49.866] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "core-47.2.2.jar" of type LIBRARY with provider net.minecraftforge.fml.loading.moddiscovery.MinecraftLocator@3c2fa57a [06Jun2025 16:18:49.867] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "language-java-47.2.2.jar" of type LANGPROVIDER with provider net.minecraftforge.fml.loading.moddiscovery.MinecraftLocator@3c2fa57a [06Jun2025 16:18:49.867] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "language-lowcode-47.2.2.jar" of type LANGPROVIDER with provider net.minecraftforge.fml.loading.moddiscovery.MinecraftLocator@3c2fa57a [06Jun2025 16:18:49.867] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "language-minecraft-47.2.2.jar" of type LANGPROVIDER with provider net.minecraftforge.fml.loading.moddiscovery.MinecraftLocator@3c2fa57a [06Jun2025 16:18:49.867] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "client-1.20.1-20230612.114412-srg.jar" of type MOD with provider net.minecraftforge.fml.loading.moddiscovery.MinecraftLocator@3c2fa57a [06Jun2025 16:18:49.867] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "forge-1.20.1-47.1.105-universal.jar" of type MOD with provider net.minecraftforge.fml.loading.moddiscovery.MinecraftLocator@3c2fa57a [06Jun2025 16:18:49.872] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Found mod file "events-47.2.2.jar" of type GAMELIBRARY with provider net.minecraftforge.fml.loading.moddiscovery.BuiltinGameLibraryLocator@38834000 [06Jun2025 16:18:49.881] [main/ERROR] [net.minecraftforge.fml.loading.UniqueModListBuilder/LOADING]: Found duplicate mods:     Mod ID: 'rubidium' from mod files: rubidium-mc1.20.1-0.7.1.jar, embeddium-0.3.31+mc1.20.1.jar [06Jun2025 16:18:49.882] [main/ERROR] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Failed to build unique mod list after mod discovery. net.minecraftforge.fml.loading.EarlyLoadingException: Duplicate mods found     at net.minecraftforge.fml.loading.UniqueModListBuilder.buildUniqueList(UniqueModListBuilder.java:87) ~[loader-47.2.2.jar:47.2]     at net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer.discoverMods(ModDiscoverer.java:106) ~[loader-47.2.2.jar:47.2]     at net.minecraftforge.fml.loading.FMLLoader.beginModScan(FMLLoader.java:164) ~[loader-47.2.2.jar:47.2]     at net.minecraftforge.fml.loading.FMLServiceProvider.beginScanning(FMLServiceProvider.java:86) ~[loader-47.2.2.jar:47.2]     at cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:112) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$8(TransformationServicesHandler.java:100) ~[modlauncher-10.0.9.jar:?]     at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]     at java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1779) ~[?:?]     at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]     at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]     at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) ~[?:?]     at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?]     at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) ~[?:?]     at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622) ~[?:?]     at java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627) ~[?:?]     at cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:102) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:55) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.Launcher.run(Launcher.java:88) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar:?]     at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?]     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 io.github.zekerzhayard.forgewrapper.installer.Main.main(Main.java:67) ~[?:?]     at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105) ~[?:?]     at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129) ~[?:?]     at org.prismlauncher.EntryPoint.main(EntryPoint.java:70) ~[?:?] [06Jun2025 16:18:49.894] [main/ERROR] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Mod Discovery failed. Skipping dependency discovery.    

I've just started modding, and I'm trying to make custom swords. When I try to import SwordItem, I get the error:  What confuses me is that other item classes work fine: package io.github.xxx.denseswords.item; import io.github.xxx.denseswords.DenseSwords; import net.minecraft.world.item.Item; // works fine import net.minecraft.world.item.ShovelItem; // works fine import net.minecraft.world.item.SwordItem; // Error: The import cannot be resolved import net.minecraftforge.registries.DeferredRegister; import net.minecraftforge.registries.RegistryObject; Forge MDK v55.0.15 - Minecraft 1.21.5 Java v24.0.1 Windows 11 IDE: Visual Studio Code