Unknownreported this bug
ReplaceEquipModel augments replace item model, but not equipment model on paper 1.21.4 build 150, using mythic 5342 and crucible 3971 snapshots. This error is in the console. I suspect augments are not using asset id for equipment in 1.21.4.
[23:57:28 ERROR]: [MythicMobs] [EVENTS] Exception thrown whilst handling event: org.bukkit.event.inventory.InventoryClickEvent
[23:57:28 WARN]: java.lang.NoSuchMethodError: 'io.papermc.paper.datacomponent.item.Equippable$Builder io.papermc.paper.datacomponent.item.Equippable$Builder.model(net.kyori.adventure.key.Key)'
[23:57:28 WARN]: at MythicCrucible-2.2.0-SNAPSHOT.jar//io.lumine.mythiccrucible.items.augments.AugmentListener.onInventoryClick(AugmentListener.java:279)
[23:57:28 WARN]: at MythicMobs-5.8.0-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.Delegates$ConsumerToBiConsumerSecond.accept(Delegates.java:144)
[23:57:28 WARN]: at MythicMobs-5.8.0-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.events.functional.single.EventListener.execute(EventListener.java:131)
[23:57:28 WARN]: at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80)
[23:57:28 WARN]: at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70)
[23:57:28 WARN]: at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54)
[23:57:28 WARN]: at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131)
[23:57:28 WARN]: at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628)
[23:57:28 WARN]: at net.minecraft.server.network.ServerGamePacketListenerImpl.handleContainerClick(ServerGamePacketListenerImpl.java:3188)
[23:57:28 WARN]: at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:69)
[23:57:28 WARN]: at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:14)
[23:57:28 WARN]: at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:29)
[23:57:28 WARN]: at net.minecraft.server.TickTask.run(TickTask.java:18)
[23:57:28 WARN]: at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:155)
[23:57:28 WARN]: at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1448)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:176)
[23:57:28 WARN]: at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:129)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1428)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1422)
[23:57:28 WARN]: at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:139)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1379)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1387)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1264)
[23:57:28 WARN]: at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:310)
[23:57:28 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583)