Something about teams???

Here is the crash report:

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

Time: 7/26/13 9:25 PM
Description: Exception in world tick

java.lang.IllegalStateException: Player is either on another team or not on any team. Cannot remove from team 'hbr10'.
at atg.b(SourceFile:202)
at bct.a(SourceFile:1164)
at ft.a(SourceFile:99)
at cn.b(SourceFile:354)
at bct.e(SourceFile:98)
at bda.b(SourceFile:60)
at ats.k(SourceFile:1386)
at ats.S(SourceFile:663)
at ats.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:101)

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

– Head –
Stacktrace:
at atg.b(SourceFile:202)
at bct.a(SourceFile:1164)
at ft.a(SourceFile:99)
at cn.b(SourceFile:354)
at bct.e(SourceFile:98)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bdf['goldkilla88'/6888115, l='MpServer', x=-7.29, y=68.89, z=26.05]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (568,57,185), Chunk: (at 8,3,9 in 35,11; contains blocks 560,0,176 to 575,255,191), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
Level time: 447610 game time, 638301 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: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 29 total; [te['Creeper'/7296365, l='MpServer', x=33.50, y=63.00, z=-30.50], bev['ItzCrimsonBro'/7069006, l='MpServer', x=-7.47, y=63.00, z=38.78], bev['ItzCrimsonBro'/6662659, l='MpServer', x=27.94, y=63.00, z=-39.69], bev['BeckyP1110'/6251056, l='MpServer', x=29.50, y=63.00, z=-38.50], bev['MegaRainbowz'/6967595, l='MpServer', x=-25.31, y=67.22, z=16.88], bev['MegaRainbowz'/6733150, l='MpServer', x=-7.56, y=63.00, z=32.29], bev['ItzCrimsonBro'/6662659, l='MpServer', x=-7.50, y=63.00, z=44.69], bdf['goldkilla88'/6888115, l='MpServer', x=-7.29, y=68.89, z=26.05], te['Creeper'/7297359, l='MpServer', x=56.50, y=63.00, z=-38.50], bev['BeckyP1110'/6251056, l='MpServer', x=-6.59, y=66.00, z=48.69], ts['Spider'/7297355, l='MpServer', x=59.41, y=64.00, z=-45.38], bev['BeckyP1110'/6251056, l='MpServer', x=25.91, y=68.16, z=-33.84], bev['ItzCrimsonBro'/6662659, l='MpServer', x=28.94, y=63.00, z=-39.00], bev['MegaRainbowz'/6733150, l='MpServer', x=-7.50, y=63.00, z=4.06], bev['MegaRainbowz'/6733150, l='MpServer', x=-6.22, y=63.00, z=62.09], te['Creeper'/7297753, l='MpServer', x=-55.50, y=63.00, z=-34.50], te['Creeper'/7295557, l='MpServer', x=-43.50, y=63.00, z=-31.50], ts['Spider'/7295561, l='MpServer', x=-44.50, y=63.00, z=-35.50], te['Creeper'/7297747, l='MpServer', x=-47.50, y=63.00, z=-35.50], te['Creeper'/7297749, l='MpServer', x=-45.50, y=63.00, z=-37.50], bev['MegaRainbowz'/6967595, l='MpServer', x=30.47, y=63.00, z=-40.91], se['Wolf'/7117799, l='MpServer', x=-79.34, y=64.00, z=-25.31], bev['BeckyP1110'/6251056, l='MpServer', x=25.88, y=68.16, z=-33.84], bev['MegaRainbowz'/6967595, l='MpServer', x=25.30, y=65.44, z=-40.66], bev['ItzCrimsonBro'/6662659, l='MpServer', x=28.91, y=63.00, z=-39.06], tq['Skeleton'/7294209, l='MpServer', x=-77.09, y=66.00, z=-52.50], tq['Skeleton'/7290049, l='MpServer', x=-86.50, y=67.00, z=-30.50], tv['Zombie'/7291366, l='MpServer', x=24.50, y=38.00, z=-22.50], bev['MegaRainbowz'/6733150, l='MpServer', x=7.59, y=63.00, z=107.56]]
Retry entities: 0 total; []
Server brand: craftbukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at bda.a(SourceFile:284)
at ats.k(SourceFile:1393)
at ats.S(SourceFile:663)
at ats.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:101)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bdf['goldkilla88'/6888115, l='MpServer', x=-7.29, y=68.89, z=26.05]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (568,57,185), Chunk: (at 8,3,9 in 35,11; contains blocks 560,0,176 to 575,255,191), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
Level time: 447610 game time, 638301 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: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 29 total; [te['Creeper'/7296365, l='MpServer', x=33.50, y=63.00, z=-30.50], bev['ItzCrimsonBro'/7069006, l='MpServer', x=-7.47, y=63.00, z=38.78], bev['ItzCrimsonBro'/6662659, l='MpServer', x=27.94, y=63.00, z=-39.69], bev['BeckyP1110'/6251056, l='MpServer', x=29.50, y=63.00, z=-38.50], bev['MegaRainbowz'/6967595, l='MpServer', x=-25.31, y=67.22, z=16.88], bev['MegaRainbowz'/6733150, l='MpServer', x=-7.56, y=63.00, z=32.29], bev['ItzCrimsonBro'/6662659, l='MpServer', x=-7.50, y=63.00, z=44.69], bdf['goldkilla88'/6888115, l='MpServer', x=-7.29, y=68.89, z=26.05], te['Creeper'/7297359, l='MpServer', x=56.50, y=63.00, z=-38.50], bev['BeckyP1110'/6251056, l='MpServer', x=-6.59, y=66.00, z=48.69], ts['Spider'/7297355, l='MpServer', x=59.41, y=64.00, z=-45.38], bev['BeckyP1110'/6251056, l='MpServer', x=25.91, y=68.16, z=-33.84], bev['ItzCrimsonBro'/6662659, l='MpServer', x=28.94, y=63.00, z=-39.00], bev['MegaRainbowz'/6733150, l='MpServer', x=-7.50, y=63.00, z=4.06], bev['MegaRainbowz'/6733150, l='MpServer', x=-6.22, y=63.00, z=62.09], te['Creeper'/7297753, l='MpServer', x=-55.50, y=63.00, z=-34.50], te['Creeper'/7295557, l='MpServer', x=-43.50, y=63.00, z=-31.50], ts['Spider'/7295561, l='MpServer', x=-44.50, y=63.00, z=-35.50], te['Creeper'/7297747, l='MpServer', x=-47.50, y=63.00, z=-35.50], te['Creeper'/7297749, l='MpServer', x=-45.50, y=63.00, z=-37.50], bev['MegaRainbowz'/6967595, l='MpServer', x=30.47, y=63.00, z=-40.91], se['Wolf'/7117799, l='MpServer', x=-79.34, y=64.00, z=-25.31], bev['BeckyP1110'/6251056, l='MpServer', x=25.88, y=68.16, z=-33.84], bev['MegaRainbowz'/6967595, l='MpServer', x=25.30, y=65.44, z=-40.66], bev['ItzCrimsonBro'/6662659, l='MpServer', x=28.91, y=63.00, z=-39.06], tq['Skeleton'/7294209, l='MpServer', x=-77.09, y=66.00, z=-52.50], tq['Skeleton'/7290049, l='MpServer', x=-86.50, y=67.00, z=-30.50], tv['Zombie'/7291366, l='MpServer', x=24.50, y=38.00, z=-22.50], bev['MegaRainbowz'/6733150, l='MpServer', x=7.59, y=63.00, z=107.56]]
Retry entities: 0 total; []
Server brand: craftbukkit
Server type: Non-integrated multiplayer server

– System Details –
Details:
Minecraft Version: 1.6.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_11, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 91135736 bytes (86 MB) / 215482368 bytes (205 MB) up to 9544400896 bytes (9102 MB)
JVM Flags: 1 total; -Xmx10G
AABB Pool Size: 302 (16912 bytes; 0 MB) allocated, 189 (10584 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
Launched Version: 1.6.2
LWJGL: 2.9.0
OpenGL: GeForce GTX 650 Ti BOOST/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Pack: faithful32pack.zip
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 83 (4648 bytes; 0 MB) allocated, 42 (2352 bytes; 0 MB) used