Error reflectively creating keyed attribute modifier

[BAD7777]

[HuskSync] Error reflectively creating keyed attribute modifier java.lang.reflect.InvocationTargetException: null at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:74) ~[?:?] at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502) ~[?:?] at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486) ~[?:?] at HuskSync-Paper-3.6.7-c949c97.jar/net.william278.husksync.data.BukkitData$Attributes.adapt(BukkitData.java:662) ~[HuskSync-Paper-3.6.7-c949c97.jar:?] at HuskSync-Paper-3.6.7-c949c97.jar/net.william278.husksync.data.BukkitData$Attributes.lambda$applyAttribute$2(BukkitData.java:642) ~[HuskSync-Paper-3.6.7-c949c97.jar:?] at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[?:?] at HuskSync-Paper-3.6.7-c949c97.jar/net.william278.husksync.data.BukkitData$Attributes.applyAttribute(BukkitData.java:642) ~[HuskSync-Paper-3.6.7-c949c97.jar:?] at HuskSync-Paper-3.6.7-c949c97.jar/net.william278.husksync.data.BukkitData$Attributes.lambda$apply$3(BukkitData.java:685) ~[HuskSync-Paper-3.6.7-c949c97.jar:?] at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[?:?] at HuskSync-Paper-3.6.7-c949c97.jar/net.william278.husksync.data.BukkitData$Attributes.apply(BukkitData.java:685) ~[HuskSync-Paper-3.6.7-c949c97.jar:?] at HuskSync-Paper-3.6.7-c949c97.jar/net.william278.husksync.data.BukkitData.apply(BukkitData.java:64) ~[HuskSync-Paper-3.6.7-c949c97.jar:?] at HuskSync-Paper-3.6.7-c949c97.jar/net.william278.husksync.data.UserDataHolder.lambda$applySnapshot$6(UserDataHolder.java:118) ~[HuskSync-Paper-3.6.7-c949c97.jar:?] at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:86) ~[purpur-1.21.jar:1.21-2272-b2d1fea] at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:475) ~[purpur-1.21.jar:1.21-2272-b2d1fea] at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1761) ~[purpur-1.21.jar:1.21-2272-b2d1fea] at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:509) ~[purpur-1.21.jar:1.21-2272-b2d1fea] at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1633) ~[purpur-1.21.jar:1.21-2272-b2d1fea] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1333) ~[purpur-1.21.jar:1.21-2272-b2d1fea] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:333) ~[purpur-1.21.jar:1.21-2272-b2d1fea] at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?] Caused by: java.lang.IllegalArgumentException: Key cannot be null at com.google.common.base.Preconditions.checkArgument(Preconditions.java:143) ~[guava-32.1.2-jre.jar:?] at org.bukkit.attribute.AttributeModifier.<init>(AttributeModifier.java:55) ~[paper-mojangapi-1.21-R0.1-SNAPSHOT.jar:?] at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62) ~[?:?] ... 19 more

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Current Purpur Version: 1.21-2272-b2d1fea (MC: 1.21)
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[WiIIiam278]

Closing in favor of #348