1.12.2, Ticking error

[Singulariity]

Hello, my game crash while i'm with my little brother, here the logs :

WARNING: coremods are present:
  llibrary (llibrary-core-1.0.11-1.12.2.jar)
  Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
  AstralCore (astralsorcery-1.12.2-1.10.19.jar)
  midnight (themidnight-0.3.5.jar)
  FMLPlugin (albedo-0.1.3.jar)
  wings (wings-1.0.6-1.12.2.jar)
  IvToolkit (IvToolkit-1.3.3-1.12.jar)
  iceandfire (iceandfire-1.9.1-1.12.2.jar)
Contact their authors BEFORE contacting forge

// Don't be sad, have a hug! <3

Time: 11/10/20 7:56 PM
Description: Ticking player

java.lang.ArrayIndexOutOfBoundsException: 6
    at com.thexfactor117.lsc.loot.Rarity.getRarity(Rarity.java:73)
    at com.thexfactor117.lsc.events.EventContainerOpen.generate(EventContainerOpen.java:71)
    at com.thexfactor117.lsc.events.EventContainerOpen.onContainerOpen(EventContainerOpen.java:53)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_87_EventContainerOpen_onContainerOpen_PlayerContainerEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraft.entity.player.EntityPlayerMP.func_71128_l(EntityPlayerMP.java:1023)
    at net.minecraft.entity.player.EntityPlayerMP.func_71053_j(EntityPlayerMP.java:1009)
    at net.minecraft.entity.player.EntityPlayerMP.func_70071_h_(EntityPlayerMP.java:328)
    at net.minecraft.world.World.func_72866_a(World.java:1993)
    at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:832)
    at net.minecraft.world.World.func_72870_g(World.java:1955)
    at net.minecraft.world.WorldServer.func_184147_l(WorldServer.java:642)
    at net.minecraft.world.World.func_72939_s(World.java:1734)
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:279)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Thread.java:745)

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

-- Head --
Thread: Server thread
Stacktrace:
    at com.thexfactor117.lsc.loot.Rarity.getRarity(Rarity.java:73)
    at com.thexfactor117.lsc.events.EventContainerOpen.generate(EventContainerOpen.java:71)
    at com.thexfactor117.lsc.events.EventContainerOpen.onContainerOpen(EventContainerOpen.java:53)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_87_EventContainerOpen_onContainerOpen_PlayerContainerEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraft.entity.player.EntityPlayerMP.func_71128_l(EntityPlayerMP.java:1023)
    at net.minecraft.entity.player.EntityPlayerMP.func_71053_j(EntityPlayerMP.java:1009)
    at net.minecraft.entity.player.EntityPlayerMP.func_70071_h_(EntityPlayerMP.java:328)
    at net.minecraft.world.World.func_72866_a(World.java:1993)
    at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:832)
    at net.minecraft.world.World.func_72870_g(World.java:1955)

-- Player being ticked --
Details:
    Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)
    Entity ID: 12607
    Entity Name: xBulley
    Entity's Exact location: -154.30, 28.96, 302.33
    Entity's Block location: World: (-155,28,302), Chunk: (at 5,1,14 in -10,18; contains blocks -160,0,288 to -145,255,303), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
    Entity's Momentum: 0.00, -0.05, -0.18
    Entity's Passengers: []
    Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
    at net.minecraft.world.WorldServer.func_184147_l(WorldServer.java:642)
    at net.minecraft.world.World.func_72939_s(World.java:1734)
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)

-- Affected level --
Details:
    Level name: New World
    All players: 2 total; [EntityPlayerMP['xBulley'/12607, l='New World', x=-154.30, y=28.96, z=302.33], EntityPlayerMP['Blastdoor'/5021, l='New World', x=-94.92, y=76.00, z=157.00]]
    Chunk stats: ServerChunkCache: 943 Drop: 0
    Level seed: 5788836052947386968
    Level generator: ID 06 - BIOMESOP, ver 0. Features enabled: true
    Level generator options:
    Level spawn location: World: (-96,64,142), Chunk: (at 0,4,14 in -6,8; contains blocks -96,0,128 to -81,255,143), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
    Level time: 55560 game time, 55560 day time
    Level dimension: 0
    Level storage version: 0x04ABD - Anvil
    Level weather: Rain time: 38892 (now: false), thunder time: 122706 (now: false)
    Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:279)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1012551208 bytes (965 MB) / 2583691264 bytes (2464 MB) up to 6442450944 bytes (6144 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx6G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 104
    FML: MCP 9.42 Powered by Forge 14.23.5.2837 Optifine OptiFine_1.12.2_HD_U_F6_pre1 49 mods loaded, 49 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State  | ID                  | Version                  | Source                                        | Signature                                |
    |:------ |:------------------- |:------------------------ |:--------------------------------------------- |:---------------------------------------- |
    | LCHIJA | minecraft           | 1.12.2                   | minecraft.jar                                 | None                                     |
    | LCHIJA | mcp                 | 9.42                     | minecraft.jar                                 | None                                     |
    | LCHIJA | FML                 | 8.0.99.99                | forge-1.12.2-14.23.5.2837.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | forge               | 14.23.5.2837             | forge-1.12.2-14.23.5.2837.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | ivtoolkit           | 1.3.3-1.12               | minecraft.jar                                 | None                                     |
    | LCHIJA | albedocore          | 0.1                      | minecraft.jar                                 | None                                     |
    | LCHIJA | albedo              | 0.1.3                    | albedo-0.1.3.jar                              | None                                     |
    | LCHIJA | baubles             | 1.5.2                    | Baubles-1.12-1.5.2.jar                        | None                                     |
    | LCHIJA | astralsorcery       | 1.10.19                  | astralsorcery-1.12.2-1.10.19.jar              | a0f0b759d895c15ceb3e3bcb5f3c2db7c582edf0 |
    | LCHIJA | battletowers        | 1.6.5                    | BattleTowers-1.12.2.jar                       | None                                     |
    | LCHIJA | betternether        | 0.1.8.6                  | Better-Nether-Mod-1.12.2.jar                  | None                                     |
    | LCHIJA | biomesoplenty       | 7.0.1.2441               | BiomesOPlenty-1.12.2-7.0.1.2441-universal.jar | None                                     |
    | LCHIJA | cursedlib           | 1.0.0                    | FlameLib-1.12.2-0.0.7.jar                     | None                                     |
    | LCHIJA | bountifulbaubles    | 0.0.1                    | Bountiful+Baubles-1.12.2-0.0.6.jar            | None                                     |
    | LCHIJA | castle_dungeons     | 1.2                      | Castle-Dungeons-Mod-1.12.2.jar                | None                                     |
    | LCHIJA | champions           | 1.12.2-1.0.10.1          | champions-1.12.2-1.0.10.1.jar                 | 5d5b8aee896a4f5ea3f3114784742662a67ad32f |
    | LCHIJA | classiccombat       | 1.0.0                    | ClassicCombat-1.12-1.0.0.jar                  | None                                     |
    | LCHIJA | customspawner       | 3.11.3                   | CustomMobSpawner-3.11.3.jar                   | None                                     |
    | LCHIJA | damageindicatorsmod | 1.0                      | Damage-Indicators-Mod-1.12.2.jar              | None                                     |
    | LCHIJA | doggytalents        | 1.15.1.5                 | DoggyTalents-1.12.2-1.15.1.5.jar              | None                                     |
    | LCHIJA | mocreatures         | 12.0.3                   | DrZharks MoCreatures Mod-12.0.3.jar           | None                                     |
    | LCHIJA | enhancedarmaments   | 1.3.15                   | EnhancedArmaments-1.3.15.jar                  | None                                     |
    | LCHIJA | grimoireofgaia      | 1.7.2                    | GrimoireOfGaia3-1.12.2-1.7.2.jar              | None                                     |
    | LCHIJA | waila               | 1.8.26                   | Hwyla-1.8.26-B41_1.12.2.jar                   | None                                     |
    | LCHIJA | llibrary            | 1.7.18                   | llibrary-1.7.18-1.12.2.jar                    | b9f30a813bee3b9dd5652c460310cfcd54f6b7ec |
    | LCHIJA | iceandfire          | 1.9.1                    | iceandfire-1.9.1-1.12.2.jar                   | None                                     |
    | LCHIJA | ichunutil           | 7.2.1                    | iChunUtil-1.12.2-7.2.1.jar                    | 4db5c2bd1b556f252a5b8b54b256d381b2a0a6b8 |
    | LCHIJA | increasemobs        | 1.1.0                    | IncreaseMobs_1.12.2-v1.1.0.jar                | None                                     |
    | LCHIJA | inventorytweaks     | 1.63+release.109.220f184 | InventoryTweaks-1.63.jar                      | 55d2cd4f5f0961410bf7b91ef6c6bf00a766dcbe |
    | LCHIJA | jei                 | 4.15.0.283               | jei_1.12.2-4.15.0.283.jar                     | None                                     |
    | LCHIJA | lsc                 | 0.6.2.2-alpha            | Loot-Slash-Conquer-Mod-1.12.2.jar             | None                                     |
    | LCHIJA | mantle              | 1.12-1.3.3.55            | Mantle-1.12-1.3.3.55.jar                      | None                                     |
    | LCHIJA | megaloot            | 0.1.4                    | megaloot-1.12.2-0.1.4.jar                     | None                                     |
    | LCHIJA | mobends             | 0.24                     | mobends-0.24_for_MC-1.12.jar                  | None                                     |
    | LCHIJA | portalgun           | 7.1.0                    | PortalGun-1.12.2-7.1.0.jar                    | 4db5c2bd1b556f252a5b8b54b256d381b2a0a6b8 |
    | LCHIJA | reccomplex          | 1.4.5                    | RecurrentComplex-1.4.5.1.jar                  | None                                     |
    | LCHIJA | ruins               | 17.2                     | Ruins-Mod-1.12.2.jar                          | None                                     |
    | LCHIJA | simplecore          | 1.7.3.4                  | simplecore-1.12.2-1.7.3.4.jar                 | None                                     |
    | LCHIJA | simpleores          | 1.11.2.2                 | simpleores-1.12.2-1.11.2.2.jar                | None                                     |
    | LCHIJA | xat                 | 0.25.1                   | Trinkets and Baubles-1.12.2-0.25.1.jar        | None                                     |
    | LCHIJA | twilightforest      | 3.8.689                  | twilightforest-1.12.2-3.8.689-universal.jar   | None                                     |
    | LCHIJA | uteamcore           | 2.2.4.94                 | U-Team-Core-1.12.2.jar                        | None                                     |
    | LCHIJA | usefulbackpacks     | 1.3.1.13                 | useful_backpacks-1.12.2-1.3.1.13.jar          | None                                     |
    | LCHIJA | waystones           | 4.0.72                   | Waystones_1.12.2-4.0.72.jar                   | None                                     |
    | LCHIJA | wings               | 1.0.6                    | wings-1.0.6-1.12.2.jar                        | None                                     |
    | LCHIJA | bauble_wings        | 1.0.0                    | wings-1.0.6-1.12.2.jar                        | None                                     |
    | LCHIJA | mobends_wings       | 1.0.0                    | wings-1.0.6-1.12.2.jar                        | None                                     |
    | LCHIJA | orelib              | 3.6.0.1                  | OreLib-1.12.2-3.6.0.1.jar                     | 7a2128d395ad96ceb9d9030fbd41d035b435753a |
    | LCHIJA | midnight            | 0.3.5                    | themidnight-0.3.5.jar                         | None                                     |

    Loaded coremods (and transformers):
llibrary (llibrary-core-1.0.11-1.12.2.jar)
  net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer
  net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher
Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
  invtweaks.forge.asm.ContainerTransformer
AstralCore (astralsorcery-1.12.2-1.10.19.jar)
 
midnight (themidnight-0.3.5.jar)
  com.mushroom.midnight.core.transformer.MidnightClassTransformer
FMLPlugin (albedo-0.1.3.jar)
  elucent.albedo.asm.ASMTransformer
wings (wings-1.0.6-1.12.2.jar)
  me.paulf.wings.server.asm.WingsRuntimePatcher
  me.paulf.wings.server.asm.mobends.WingsMoBendsRuntimePatcher
IvToolkit (IvToolkit-1.3.3-1.12.jar)
 
iceandfire (iceandfire-1.9.1-1.12.2.jar)
  com.github.alexthe666.iceandfire.patcher.IceAndFireRuntimePatcher
    GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
    Profiler Position: N/A (disabled)
    Player Count: 2 / 8; [EntityPlayerMP['xBulley'/12607, l='New World', x=-154.30, y=28.96, z=302.33], EntityPlayerMP['Blastdoor'/5021, l='New World', x=-94.92, y=76.00, z=157.00]]
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    OptiFine Version: OptiFine_1.12.2_HD_U_F6_pre1
    OptiFine Build: 20191206-224929
    Render Distance Chunks: 12
    Mipmaps: 4
    Anisotropic Filtering: 1
    Antialiasing: 0
    Multitexture: false
    Shaders: KUDA-Shaders v6.1 Legacy.zip
    OpenGlVersion: 4.6.0 NVIDIA 456.71
    OpenGlRenderer: GeForce GTX 1070/PCIe/SSE2
    OpenGlVendor: NVIDIA Corporation
    CpuCount: 4