Problème Minecraft (Ascentia)

[Panoramix]

Bonsoir, j'ai un bug avec mon Minecraft le voici:

---- Minecraft Crash Report ----
// Sorry :(

Time: 21/03/16 19:27
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
    at Bc.a(Unknown Source)
    at mC.e(Unknown Source)
    at mC.av(Unknown Source)
    at sL.a(Unknown Source)
    at sL.a(Unknown Source)
    at bma.a(Unknown Source)
    at sw.a(Unknown Source)
    at sw.b(Unknown Source)
    at mR.hI(Unknown Source)
    at mR.f(Unknown Source)
    at net.minecraft.client.main.Main.main(Unknown Source)


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

-- Head --
Stacktrace:
    at Bc.a(Unknown Source)
    at mC.e(Unknown Source)
    at mC.av(Unknown Source)
    at sL.a(Unknown Source)
    at sL.a(Unknown Source)
    at bma.a(Unknown Source)
    at sw.a(Unknown Source)

-- Affected level --
Details:
    Level name: MpServer
    All players: 1 total; [rk['NoopyyGaming'/170, l='MpServer', x=-303,34, y=70,19, z=234,82]]
    Chunk stats: MultiplayerChunkCache: 441, 441
    Level seed: 0
    Level generator: ID 00 - default, ver 1. Features enabled: false
    Level generator options:
    Level spawn location: World: (-304,66,231), Chunk: (at 0,4,7 in -19,14; contains blocks -304,0,224 to -289,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
    Level time: 59949148 game time, 60888715 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: 17 total; [Hm['Enderman'/1440, l='MpServer', x=-320,50, y=14,00, z=223,50], Hm['Enderman'/2497, l='MpServer', x=-295,50, y=50,00, z=211,50], Hm['Enderman'/1314, l='MpServer', x=-269,22, y=65,00, z=243,25], Hm['Enderman'/2279, l='MpServer', x=-309,59, y=14,00, z=263,53], HB['Sorcière'/2152, l='MpServer', x=-307,50, y=19,00, z=234,50], Hm['Enderman'/2280, l='MpServer', x=-305,50, y=14,00, z=257,50], Hm['Enderman'/2536, l='MpServer', x=-312,50, y=24,00, z=283,50], HB['Sorcière'/2153, l='MpServer', x=-304,34, y=17,00, z=232,28], Gt['§e§oRègles'/171, l='MpServer', x=-291,31, y=123,55, z=211,22], Ic['entity.WitherSkull.name'/172, l='MpServer', x=-291,31, y=123,31, z=211,22], HB['Sorcière'/2028, l='MpServer', x=-310,28, y=41,00, z=230,31], Hm['Enderman'/528, l='MpServer', x=-308,91, y=64,00, z=241,88], rk['NoopyyGaming'/170, l='MpServer', x=-303,34, y=70,19, z=234,82], Hy['Slime'/2482, l='MpServer', x=-327,62, y=11,08, z=258,71], Hm['Enderman'/2073, l='MpServer', x=-308,44, y=19,00, z=238,06], Hm['Enderman'/2074, l='MpServer', x=-307,53, y=19,00, z=238,53], Hm['Enderman'/1278, l='MpServer', x=-245,31, y=65,00, z=260,00]]
    Retry entities: 0 total; []
    Server brand: Spigot
    Server type: Non-integrated multiplayer server
Stacktrace:
    at rf.a(Unknown Source)
    at mR.d(Unknown Source)
    at mR.f(Unknown Source)
    at net.minecraft.client.main.Main.main(Unknown Source)

-- System Details --
Details:
    Minecraft Version: 1.7.10
    Operating System: Windows 7 (amd64) version 6.1
    Java Version: 1.8.0_73, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 159903048 bytes (152 MB) / 712507392 bytes (679 MB) up to 1908932608 bytes (1820 MB)
    JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2048M
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
    Launched Version: 1.7.10
    LWJGL: 2.9.1
    OpenGL: GeForce 7025 / nForce 630a/integrated/SSE2 GL version 2.1.2, NVIDIA Corporation
    GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because ARB_framebuffer_object 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: Very likely; Jar signature invalidated
    Type: Client (map_client.txt)
    Resource Packs: [faithful32packOptiFine.zip]
    Current Language: Français (France)
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Anisotropic Filtering: Off (1)

Je ne sais pas d'où sa vient, a mon avis sa dois être du fait que j'ai encore un mobs ou un item de la 1.9 ou je sais quoi


Cordialement