coremods

so i downloaded a mod pack folder from a popular bedwars youtuber sammy green then i launched up minecraft and then crash i viewed crash report and it said this:

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Who set us up the TNT?

Time: 02/02/20 12:19 AM
Description: Initializing game

java.lang.IllegalStateException: circular model dependencies involving model minecraft:builtin/missing
    at net.minecraftforge.client.model.ModelLoader.loadAnyModel(ModelLoader.java:372)
    at net.minecraftforge.client.model.ModelLoader.getModel(ModelLoader.java:358)
    at net.minecraftforge.client.model.ModelLoader.getMissingModel(ModelLoader.java:816)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getMissingModel(ModelLoaderRegistry.java:148)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:138)
    at net.minecraftforge.client.model.ModelLoader.loadAnyModel(ModelLoader.java:377)
    at net.minecraftforge.client.model.ModelLoader.getModel(ModelLoader.java:358)
    at net.minecraftforge.client.model.ModelLoader.getMissingModel(ModelLoader.java:816)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getMissingModel(ModelLoaderRegistry.java:148)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:138)
    at net.minecraftforge.client.model.ModelLoader.loadAnyModel(ModelLoader.java:377)
    at net.minecraftforge.client.model.ModelLoader.getModel(ModelLoader.java:358)
    at net.minecraftforge.client.model.ModelLoader.loadItems(ModelLoader.java:290)
    at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:116)
    at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
    at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:558)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:410)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Stacktrace:
    at net.minecraftforge.client.model.ModelLoader.loadAnyModel(ModelLoader.java:372)
    at net.minecraftforge.client.model.ModelLoader.getModel(ModelLoader.java:358)
    at net.minecraftforge.client.model.ModelLoader.getMissingModel(ModelLoader.java:816)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getMissingModel(ModelLoaderRegistry.java:148)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:138)
    at net.minecraftforge.client.model.ModelLoader.loadAnyModel(ModelLoader.java:377)
    at net.minecraftforge.client.model.ModelLoader.getModel(ModelLoader.java:358)
    at net.minecraftforge.client.model.ModelLoader.getMissingModel(ModelLoader.java:816)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getMissingModel(ModelLoaderRegistry.java:148)
    at net.minecraftforge.client.model.ModelLoaderRegistry.getModel(ModelLoaderRegistry.java:138)
    at net.minecraftforge.client.model.ModelLoader.loadAnyModel(ModelLoader.java:377)
    at net.minecraftforge.client.model.ModelLoader.getModel(ModelLoader.java:358)
    at net.minecraftforge.client.model.ModelLoader.loadItems(ModelLoader.java:290)
    at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:116)
    at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
    at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:558)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:410)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.8.9
    Operating System: Windows 10 (amd64) version 10.0
    CPU: 4x AMD A12-9720P RADEON R7, 12 COMPUTE CORES 4C+8G
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 345071944 bytes (329 MB) / 805306368 bytes (768 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: 
    Loaded coremods (and transformers): 
    Launched Version: 1.8.9-forge1.8.9-11.15.1.1722
    LWJGL: 2.9.4
    OpenGL: AMD Radeon R7 Graphics GL version 4.6.13559 Compatibility Profile Context 26.20.12028.2, ATI Technologies Inc.
    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: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: §2§lSammys §9§lBedwars §4§lPack §6§lV3.zip
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 4x AMD A12-9720P RADEON R7, 12 COMPUTE CORES 4C+8G
    OptiFine Version: OptiFine_1.8.9_HD_U_H7
    Render Distance Chunks: 8
    Mipmaps: 4
    Anisotropic Filtering: 1
    Antialiasing: 0
    Multitexture: false
    Shaders: null
    OpenGlVersion: 4.6.13559 Compatibility Profile Context 26.20.12028.2
    OpenGlRenderer: AMD Radeon R7 Graphics
    OpenGlVendor: ATI Technologies Inc.
    CpuCount: 4