nametagedit error

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 7.3.15 21:18
Description: Unexpected error

java.lang.IllegalStateException: Player is either on another team or not on any team. Cannot remove from team 'NTE1'.
	at ayr.a(SourceFile:206)
	at biv.a(SourceFile:1129)
	at hr.a(SourceFile:99)
	at hr.a(SourceFile:13)
	at ef.a(SourceFile:164)
	at biy.e(SourceFile:212)
	at azd.o(MinecraftOverlay.java:1281)
	at azd.ad(MinecraftOverlay.java:753)
	at azd.e(MinecraftOverlay.java:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at ayr.a(SourceFile:206)
	at biv.a(SourceFile:1129)
	at hr.a(SourceFile:99)
	at hr.a(SourceFile:13)
	at ef.a(SourceFile:164)
	at biy.e(SourceFile:212)

-- Affected level --
Details:
	Level name: MpServer
	All players: 3 total; [bje['Iwitrag'/25880486, l='MpServer', x=1,76, y=81,62, z=-3,57], bld['FaraboleCZ'/25878265, l='MpServer', x=-5,25, y=80,00, z=2,34], bld['Werwi'/25892599, l='MpServer', x=0,00, y=80,00, z=0,00]]
	Chunk stats: MultiplayerChunkCache: 961, 961
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options:
	Level spawn location: World: (0,80,0), Chunk: (at 0,5,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 41345512 game time, 13980972 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 9 total; [bld['FaraboleCZ'/25878265, l='MpServer', x=-5,25, y=80,00, z=2,34], bld['LikeTotallyToby'/25878024, l='MpServer', x=-4,50, y=80,00, z=-2,00], bld['FaraboleCZ'/25878265, l='MpServer', x=-5,25, y=80,00, z=2,34], bld['LikeTotallyToby'/25878024, l='MpServer', x=0,31, y=80,00, z=-0,22], bje['Iwitrag'/25880486, l='MpServer', x=1,76, y=81,62, z=-3,57], vm['§6Hracu bojuje: §e§l10'/25892583, l='MpServer', x=1,00, y=-120,00, z=-4,00], bld['Werwi'/25892599, l='MpServer', x=0,00, y=80,00, z=0,00], bld['LikeTotallyToby'/25878024, l='MpServer', x=-2,58, y=80,00, z=-4,17], bld['Werwi'/25892599, l='MpServer', x=0,00, y=80,00, z=0,00]]
	Retry entities: 0 total; []
	Server brand: CraftBukkit
	Server type: Non-integrated multiplayer server
Stacktrace:
	at biz.a(SourceFile:284)
	at azd.b(MinecraftOverlay.java:1951)
	at azd.e(MinecraftOverlay.java:718)
	at net.minecraft.client.main.Main.main(SourceFile:103)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_31, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 300966520 bytes (287 MB) / 400556032 bytes (382 MB) up to 954728448 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 59 (3304 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.7.2
	LWJGL: 2.9.0
	OpenGL: AMD Radeon R7 200 Series GL version 4.3.12618 Compatibility Profile Context 13.251.0.0, ATI Technologies Inc.
	Is Modded: Definitely; Client brand changed to 'LiteLoader'
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 68 (3808 bytes; 0 MB) allocated, 18 (1008 bytes; 0 MB) used
	Anisotropic Filtering: On (4)