[1.21+] Multiple shop issues: Melee/Tools purchase error (generic.attackDamage) & BedBug (Silverfish) not spawning

[10:25:50 INFO]: [BedWars1058] DEBUG: Giving BuyItem: melee-category.category-content.iron-sword to: BufferIsCool
[10:25:50 ERROR]: Could not pass event InventoryClickEvent to BedWars1058 v25.3-SNAPSHOT
java.lang.IllegalArgumentException: Invalid key. Must be [a-z0-9/._-]: generic.attackDamage
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:218) ~[guava-32.1.2-jre.jar:?]
at org.bukkit.NamespacedKey.(NamespacedKey.java:87) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
at org.bukkit.NamespacedKey.minecraft(NamespacedKey.java:181) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
at bedwars-plugin-25.3-SNAPSHOT.jar/com.andrei1058.mc.bedwars.AbstractVerImplCmn1.getDamage(AbstractVerImplCmn1.java:212) ~[bedwars-plugin-25.3-SNAPSHOT.jar:?]
at bedwars-plugin-25.3-SNAPSHOT.jar/com.andrei1058.bedwars.shop.main.BuyItem.give(BuyItem.java:258) ~[bedwars-plugin-25.3-SNAPSHOT.jar:?]
at bedwars-plugin-25.3-SNAPSHOT.jar/com.andrei1058.bedwars.shop.main.CategoryContent.giveItems(CategoryContent.java:216) ~[bedwars-plugin-25.3-SNAPSHOT.jar:?]
at bedwars-plugin-25.3-SNAPSHOT.jar/com.andrei1058.bedwars.shop.main.CategoryContent.execute(CategoryContent.java:192) ~[bedwars-plugin-25.3-SNAPSHOT.jar:?]
at bedwars-plugin-25.3-SNAPSHOT.jar/com.andrei1058.bedwars.shop.listeners.InventoryListener.onInventoryClick(InventoryListener.java:86) ~[bedwars-plugin-25.3-SNAPSHOT.jar:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor153.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:1.21.1-133-3cb8529]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleContainerClick(ServerGamePacketListenerImpl.java:3224) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:69) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:33) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:56) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:151) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1535) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:201) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:125) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1512) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1505) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:135) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1464) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1471) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1316) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:329) ~[paper-1.21.1.jar:1.21.1-133-3cb8529]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]