java.lang.IllegalArgumentException: Duplicate id value for 3!
	at ve.a(SourceFile:67)
	at ut.c(SourceFile:38)
	at ub.<init>(SourceFile:152)
	at us.<init>(SourceFile:25)
	at us.<init>(SourceFile:30)
	at ut.<init>(SourceFile:31)
	at ags.a(SourceFile:46)
	at ags.a(SourceFile:32)
	at ahk.a(SourceFile:122)
	at bwa.a(SourceFile:312)
	at bjs.aj(SourceFile:1301)

---- Minecraft Crash Report ----
// Why is it breaking :(

Time: 5/22/14 9:52 AM
Description: Unexpected error

java.lang.IllegalArgumentException: Duplicate id value for 3!
	at ve.a(SourceFile:67)
	at ut.c(SourceFile:38)
	at ub.<init>(SourceFile:152)
	at us.<init>(SourceFile:25)
	at us.<init>(SourceFile:30)
	at ut.<init>(SourceFile:31)
	at ags.a(SourceFile:46)
	at ags.a(SourceFile:32)
	at ahk.a(SourceFile:122)
	at bwa.a(SourceFile:312)
	at bjs.aj(SourceFile:1301)
	at bjs.p(SourceFile:1660)
	at bjs.ah(SourceFile:843)
	at bjs.f(SourceFile:797)
	at net.minecraft.client.main.Main.main(SourceFile:121)


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

-- Head --
Stacktrace:
	at ve.a(SourceFile:67)
	at ut.c(SourceFile:38)
	at ub.<init>(SourceFile:152)
	at us.<init>(SourceFile:25)
	at us.<init>(SourceFile:30)
	at ut.<init>(SourceFile:31)
	at ags.a(SourceFile:46)
	at ags.a(SourceFile:32)
	at ahk.a(SourceFile:122)
	at bwa.a(SourceFile:312)
	at bjs.aj(SourceFile:1301)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bzw['keyl1'/81, l='MpServer', x=-518.17, y=4.00, z=780.46]]
	Chunk stats: MultiplayerChunkCache: 169, 169
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: -462.00,4.00,888.00 - World: (-462,4,888), Chunk: (at 2,0,8 in -29,55; contains blocks -464,0,880 to -449,255,895), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
	Level time: 292477 game time, 292477 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: 30 total; [abm['Slime'/65, l='MpServer', x=-443.41, y=4.00, z=706.15], abm['Slime'/66, l='MpServer', x=-442.07, y=4.00, z=728.01], yv['Pig'/67, l='MpServer', x=-441.88, y=4.00, z=769.56], yn['Cow'/21, l='MpServer', x=-592.88, y=4.00, z=799.06], yn['Cow'/22, l='MpServer', x=-595.31, y=4.00, z=788.50], yn['Cow'/25, l='MpServer', x=-576.69, y=4.00, z=804.75], ym['Chicken'/29, l='MpServer', x=-570.47, y=4.00, z=828.28], zs['item.item.bone'/31, l='MpServer', x=-566.63, y=4.00, z=817.94], zs['item.item.arrow'/30, l='MpServer', x=-566.31, y=4.00, z=818.84], abm['Slime'/35, l='MpServer', x=-550.38, y=4.00, z=715.83], zs['item.item.egg'/32, l='MpServer', x=-570.63, y=4.00, z=828.53], zs['item.item.bone'/38, l='MpServer', x=-557.63, y=4.00, z=836.44], bzw['keyl1'/81, l='MpServer', x=-518.17, y=4.00, z=780.46], yw['Sheep'/36, l='MpServer', x=-542.19, y=5.00, z=794.47], zs['item.item.arrow'/37, l='MpServer', x=-557.25, y=4.00, z=835.66], yn['Cow'/43, l='MpServer', x=-535.91, y=4.00, z=783.97], zs['item.item.bone'/46, l='MpServer', x=-536.19, y=4.00, z=804.66], yw['Sheep'/47, l='MpServer', x=-530.13, y=4.00, z=827.88], zs['item.item.rottenFlesh'/44, l='MpServer', x=-534.47, y=4.00, z=811.22], zs['item.item.arrow'/45, l='MpServer', x=-536.69, y=4.00, z=805.06], yw['Sheep'/48, l='MpServer', x=-516.06, y=5.00, z=796.88], yw['Sheep'/53, l='MpServer', x=-509.84, y=4.00, z=831.75], zs['item.item.arrow'/52, l='MpServer', x=-502.59, y=4.00, z=802.09], ym['Chicken'/59, l='MpServer', x=-476.38, y=4.00, z=816.16], ym['Chicken'/58, l='MpServer', x=-469.75, y=4.00, z=798.44], zs['item.item.egg'/57, l='MpServer', x=-475.97, y=4.00, z=790.97], ym['Chicken'/56, l='MpServer', x=-476.69, y=4.00, z=791.63], ym['Chicken'/63, l='MpServer', x=-460.63, y=4.00, z=817.81], abm['Slime'/62, l='MpServer', x=-446.53, y=4.00, z=707.97], zs['item.item.egg'/60, l='MpServer', x=-476.78, y=4.00, z=817.25]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bwb.a(SourceFile:307)
	at bjs.b(SourceFile:2127)
	at bjs.f(SourceFile:811)
	at net.minecraft.client.main.Main.main(SourceFile:121)

-- System Details --
Details:
	Minecraft Version: 14w21a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_07, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 211689760 bytes (201 MB) / 599588864 bytes (571 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 14w21a
	LWJGL: 2.9.1
	OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 8.15.10.2653, Intel
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Anisotropic Filtering: Off (1)