Not sure if it means much, but noticed this error during server boot...

Using:

• Forge 1.20.1 - 47.2.20
• metalbarrels-1.20.1-1

Error:

[28Jan2024 12:00:13.200] [main/ERROR] [net.minecraft.world.item.crafting.RecipeManager/]: Parsing error loading recipe metalbarrels:barrels/obsidian_to_netherite_barrel
com.google.gson.JsonSyntaxException: Invalid or unsupported recipe type 'minecraft:smithing'
at net.minecraft.world.item.crafting.RecipeManager.m_220253_(RecipeManager.java:170) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at java.util.Optional.orElseThrow(Optional.java:403) ~[?:?]
at net.minecraft.world.item.crafting.RecipeManager.fromJson(RecipeManager.java:169) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at net.minecraft.world.item.crafting.RecipeManager.m_5787_(RecipeManager.java:67) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at net.minecraft.world.item.crafting.RecipeManager.m_5787_(RecipeManager.java:34) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at net.minecraft.server.packs.resources.SimplePreparableReloadListener.m_10789_(SimplePreparableReloadListener.java:13) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?]
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
at net.minecraft.server.packs.resources.SimpleReloadInstance.m_143940_(SimpleReloadInstance.java:69) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at net.minecraft.Util.m_214652_(Util.java:783) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at net.minecraft.Util.m_214679_(Util.java:772) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
at net.minecraft.server.Main.main(Main.java:166) ~[server-1.20.1-20230612.114412-srg.jar%23519!/:?]
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:?]

The netherite barrel smithing recipe broke in 1.20.1 because of vanilla changes, I fixed it. Netherite barrel now requires diamond + netherite ingot + obsidian barrel