Reporter Error

{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Arial;}}
{\colortbl ;\red0\green0\blue255;\red255\green165\blue0;}
\viewkind4\uc1\pard\cf1\fs18 1:02:59 PM [INFO] Mr_Nation_12 issued server command: /report complete 1 ban\par
\cf2 1:02:59 PM [WARNING] java.lang.IllegalArgumentException: Invalid UUID string: Mr_Nation_12\par
1:02:59 PM [WARNING] \tab at java.util.UUID.fromString(Unknown Source)\par
1:02:59 PM [WARNING] \tab at net.KabOOm356.Command.ReporterCommandManager.requireUnclaimedOrPriority(ReporterCommandManager.java:761)\par
1:02:59 PM [WARNING] \tab at net.KabOOm356.Command.ReporterCommandManager.canAlterReport(ReporterCommandManager.java:675)\par
1:02:59 PM [WARNING] \tab at net.KabOOm356.Command.ReporterCommandManager.canAlterReport(ReporterCommandManager.java:699)\par
1:02:59 PM [WARNING] \tab at net.KabOOm356.Command.Commands.CompleteCommand.execute(CompleteCommand.java:73)\par
1:02:59 PM [WARNING] \tab at net.KabOOm356.Command.ReporterCommandManager.onCommand(ReporterCommandManager.java:241)\par
1:02:59 PM [WARNING] \tab at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)\par
1:02:59 PM [WARNING] \tab at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180)\par
1:02:59 PM [WARNING] \tab at org.bukkit.craftbukkit.v1_7_R3.CraftServer.dispatchCommand(CraftServer.java:701)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerConnection.java:956)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:817)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java:28)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat.java:47)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469)\par
1:02:59 PM [WARNING] \tab at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628)\par
}