IllegalStateException: Player is either on another team or not on any team.

r---- Minecraft Crash Report ----
// Oops.

Time: 21/06/13 23:00
Description: Exception in world tick

java.lang.IllegalStateException: Player is either on another team or not on any team. Cannot remove from team 'h2'.
	at arj.b(SourceFile:206)
	at bdk.a(SourceFile:1145)
	at fd.a(SourceFile:99)
	at ci.b(SourceFile:350)
	at bdk.d(SourceFile:95)
	at bds.b(SourceFile:58)
	at net.minecraft.client.Minecraft.l(SourceFile:1325)
	at net.minecraft.client.Minecraft.K(SourceFile:574)
	at net.minecraft.client.Minecraft.run(SourceFile:526)
	at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
	at arj.b(SourceFile:206)
	at bdk.a(SourceFile:1145)
	at fd.a(SourceFile:99)
	at ci.b(SourceFile:350)
	at bdk.d(SourceFile:95)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdv['web64'/3412316, l='MpServer', x=331.00, y=49.62, z=762.00]]
	Chunk stats: MultiplayerChunkCache: 0
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (331,45,731), Chunk: (at 11,2,11 in 20,45; contains blocks 320,0,720 to 335,255,735), Region: (0,1; contains chunks 0,32 to 31,63, blocks 0,0,512 to 511,255,1023)
	Level time: 444384708 game time, 799084691 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: 1 total; [bdv['web64'/3412316, l='MpServer', x=331.00, y=49.62, z=762.00]]
	Retry entities: 0 total; []
Stacktrace:
	at bds.a(SourceFile:282)
	at net.minecraft.client.Minecraft.l(SourceFile:1332)
	at net.minecraft.client.Minecraft.K(SourceFile:574)
	at net.minecraft.client.Minecraft.run(SourceFile:526)
	at java.lang.Thread.run(Unknown Source)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdv['web64'/3412316, l='MpServer', x=331.00, y=49.62, z=762.00]]
	Chunk stats: MultiplayerChunkCache: 0
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (331,45,731), Chunk: (at 11,2,11 in 20,45; contains blocks 320,0,720 to 335,255,735), Region: (0,1; contains chunks 0,32 to 31,63, blocks 0,0,512 to 511,255,1023)
	Level time: 444384708 game time, 799084691 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: 1 total; [bdv['web64'/3412316, l='MpServer', x=331.00, y=49.62, z=762.00]]
	Retry entities: 0 total; []

-- System Details --
Details:
	Minecraft Version: 1.5.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 460307640 bytes (438 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 21687 (1214472 bytes; 1 MB) allocated, 21687 (1214472 bytes; 1 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	LWJGL: 2.4.2
	OpenGL: ATI Mobility Radeon HD 4670   GL version 3.2.9262 Compatibility Profile Context FireGL, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Texture Pack: faithful32pack.zip
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used