isa delete

[21:08:05] [Server thread/ERROR]  [Sponge]: Error occurred while executing command 'isa delete Hexport' for source EntityPlayerMP['Hexport'/231, l='world', x=767.50, y=78.00, z=255.50]: null
java.lang.NullPointerException
at net.mohron.skyclaims.world.Island.delete(Island.java:350) ~[Island.class:?]
at net.mohron.skyclaims.command.admin.CommandDelete.execute(CommandDelete.java:66) ~[CommandDelete.class:?]
at org.spongepowered.api.command.args.ChildCommandElementExecutor.execute(ChildCommandElementExecutor.java:182) ~[ChildCommandElementExecutor.class:1.10.2-2281-5.2.0-BETA-2317]
at org.spongepowered.api.command.spec.CommandSpec.process(CommandSpec.java:359) ~[CommandSpec.class:1.10.2-2281-5.2.0-BETA-2317]
at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:336) ~[SimpleDispatcher.class:1.10.2-2281-5.2.0-BETA-2317]
at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:291) [SpongeCommandManager.class:1.10.2-2281-5.2.0-BETA-2317]
at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:1083) [bd.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:913) [me.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:892) [me.class:?]
at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:37) [im.class:?]
at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:9) [im.class:?]
at org.spongepowered.common.network.PacketUtil.lambda$onProcessPacket$0(PacketUtil.java:157) [PacketUtil.class:1.10.2-2281-5.2.0-BETA-2317]
at org.spongepowered.common.network.PacketUtil$$Lambda$1771/1372286662.call(Unknown Source) [PacketUtil.class:1.10.2-2281-5.2.0-BETA-2317]
at org.spongepowered.common.event.tracking.CauseTracker.switchToPhase(CauseTracker.java:160) [CauseTracker.class:1.10.2-2281-5.2.0-BETA-2317]
at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:156) [PacketUtil.class:1.10.2-2281-5.2.0-BETA-2317]
at net.minecraft.network.PacketThreadUtil$1.redirect$onProcessPacket$zjh000(SourceFile:539) [fl$1.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [fl$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_45]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_45]
at net.minecraft.util.Util.func_181617_a(SourceFile:45) [h.class:?]
at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:241) [SpongeImplHooks.class:1.10.2-2281-5.2.0-BETA-2317]
at net.minecraft.server.MinecraftServer.redirect$onRun$zhn000(MinecraftServer.java:3928) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45]
[21:08:05] [Server thread/INFO]  [skyclaims]: Begin clearing region (1, 0)
[21:08:05] [Server thread/INFO]  [skyclaims]: Finished clearing region (1, 0)