Server crashes on startup

I followed a tutorial on youtube about how to make a forge server for me and a couple of friend. I started the server without mods and it worked perfectly fine but as soon as I put a mod in the server crashes on startup. I don't know how to fix this problem and I don't know anything about codes and stuff pls help.

---- Minecraft Crash Report ----

WARNING: coremods are present:
  llibrary (llibrary-core-1.0.11-1.12.2.jar)
  iceandfire (iceandfire-1.8.3.jar)
Contact their authors BEFORE contacting forge

// Why did you do that?

Time: 11-3-20 13:56
Description: Exception in server tick loop

Missing Mods:
	unknown : need [14.23.5.2772,): have 14.23.5.2768

net.minecraftforge.fml.common.MissingModsException: Mod llibrary (LLibrary) requires [forge@[14.23.5.2772,)]
	at net.minecraftforge.fml.common.Loader.sortModList(Loader.java:264)
	at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:570)
	at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:98)
	at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333)
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
	at java.lang.Thread.run(Unknown Source)


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

-- System Details --
Details:
	Minecraft Version: 1.12.2
	Operating System: Windows 10 (x86) version 10.0
	Java Version: 1.8.0_241, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 89861160 bytes (85 MB) / 212176896 bytes (202 MB) up to 259522560 bytes (247 MB)
	JVM Flags: 0 total; 
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP 9.42 Powered by Forge 14.23.5.2768 9 mods loaded, 9 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                                |
	|:----- |:------------ |:------------ |:--------------------------------------- |:---------------------------------------- |
	| U     | minecraft    | 1.12.2       | minecraft.jar                           | None                                     |
	| U     | mcp          | 9.42         | minecraft.jar                           | None                                     |
	| U     | FML          | 8.0.99.99    | forge-1.12.2-14.23.5.2768-universal.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| U     | forge        | 14.23.5.2768 | forge-1.12.2-14.23.5.2768-universal.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| U     | iceandfire   | 1.8.3        | iceandfire-1.8.3.jar                    | None                                     |
	| U     | reforged     | 0.7.5        | Reforged-0.7.5-1.12+.jar                | None                                     |
	| U     | jurassicraft | 2.1.23       | JurassiCraft-1.12.2-2.1.23.jar          | None                                     |
	| U     | llibrary     | 1.7.19       | llibrary-1.7.19-1.12.2.jar              | None                                     |
	| U     | orelib       | 3.5.2.2      | OreLib-1.12.2-3.5.2.2.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
iceandfire (iceandfire-1.8.3.jar)
  com.github.alexthe666.iceandfire.patcher.IceAndFireRuntimePatcher
	Profiler Position: N/A (disabled)
	Is Modded: Definitely; Server brand changed to 'fml,forge'
	Type: Dedicated Server (map_server.txt)