[11:32:06 WARN]: java.lang.IllegalArgumentException: Can not set net.minecraft.server.v1_12_R1.DataWatcher field net.minecraft.server.v1_12_R1.PacketPlayOutNamedEntitySpawn.h to (int)38
[11:32:06 WARN]: at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
[11:32:06 WARN]: at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:191)
[11:32:06 WARN]: at sun.reflect.UnsafeObjectFieldAccessorImpl.setInt(UnsafeObjectFieldAccessorImpl.java:114)
[11:32:06 WARN]: at java.lang.reflect.Field.setInt(Field.java:949)
[11:32:06 WARN]: at de.leitung.classes.SpawnCorpse.SpawningCorps(SpawnCorpse.java:53)
[11:32:06 WARN]: at de.leitung.classes.SpawnCorpse.onCommand(SpawnCorpse.java:29)
[11:32:06 WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[11:32:06 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152)
[11:32:06 WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1492)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1297)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14)
[11:32:06 WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[11:32:06 WARN]: at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774)
[11:32:06 WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666)
[11:32:06 WARN]: at java.lang.Thread.run(Thread.java:748)