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Okay, so I was making a map and needed a head, but I accidentally typed in the head command wrong as:

{SkullOwner:{Id:"MrCrainer",},}

I forgot to back up the world

Now when I try to open the world it crashes. The only other thing i had was optifine, but it crashed when i was using 1.8.8 first.

Is there a way to get rid of the "head" item so it stops rendering. I tried deleting player data but that didn't work.

Time: 10/19/15 7:43 PM
Description: Rendering item

java.lang.IllegalArgumentException: Name and ID cannot both be blank
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:25)
at ga.a(SourceFile:34)
at cjc.a(SourceFile:39)
at cqh.a(SourceFile:123)
at cqh.a(SourceFile:347)
at cqh.b(SourceFile:383)
at btx.a(SourceFile:878)
at btx.a(SourceFile:334)
at btx.a(SourceFile:142)
at cjh.b(EntityRenderer.java:1278)
at bss.at(SourceFile:906)
at bss.a(SourceFile:317)
at net.minecraft.client.main.Main.main(SourceFile:124)
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:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

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

-- Head --
Stacktrace:
at com.mojang.authlib.GameProfile.<init>(GameProfile.java:25)
at ga.a(SourceFile:34)
at cjc.a(SourceFile:39)
at cqh.a(SourceFile:123)
at cqh.a(SourceFile:347)

-- Item being rendered --
Details:
Item Type: [email protected]
Item Aux: 3
Item NBT: {SkullOwner:{Id:"MrCrainer",},}
Item Foil: false
Stacktrace:
at cqh.b(SourceFile:383)
at btx.a(SourceFile:878)
at btx.a(SourceFile:334)
at btx.a(SourceFile:142)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [cin['DimensionCutter'/120, l='MpServer', x=311.29, y=5.00, z=463.63]]
Chunk stats: MultiplayerChunkCache: 10, 10
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: 303.00,4.00,463.00 - World: (303,4,463), Chunk: (at 15,0,15 in 18,28; contains blocks 288,0,448 to 303,255,463), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 1336239 game time, 1119 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 9 total; [acc['Pig'/64, l='MpServer', x=339.06, y=4.00, z=435.94], acc['Pig'/65, l='MpServer', x=341.47, y=4.00, z=444.75], acc['Pig'/26, l='MpServer', x=302.53, y=4.00, z=449.81], acc['Pig'/63, l='MpServer', x=338.03, y=4.00, z=445.25], abu['Chicken'/46, l='MpServer', x=325.66, y=4.00, z=440.66], adj['All quotes on the walls are geniune NoobDude quotes'/47, l='MpServer', x=333.50, y=5.50, z=464.50], cin['DimensionCutter'/120, l='MpServer', x=311.29, y=5.00, z=463.63], adx['item.item.egg'/45, l='MpServer', x=324.66, y=4.00, z=435.34], acc['Pig'/30, l='MpServer', x=307.78, y=4.00, z=446.91]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at cem.a(WorldClient.java:399)
at bss.b(SourceFile:2278)
at bss.a(SourceFile:326)
at net.minecraft.client.main.Main.main(SourceFile:124)
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:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
Minecraft Version: 1.8.1
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_80, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 88259584 bytes (84 MB) / 294916096 bytes (281 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.8.1-OptiFine_HD_U_C7
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics Family GL version 3.1.0 - Build 8.15.10.2372, 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.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)