Technodefirmacraft 2.3.1 server crash

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 9/16/15 11:38 AM
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: cpw.mods.fml.common.FMLContainer
	at cpw.mods.fml.common.Loader.identifyMods(Loader.java:345)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:489)
	at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87)
	at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:314)
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.common.FMLContainer
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:58)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:340)
	at cpw.mods.fml.common.Loader.identifyMods(Loader.java:340)
	... 6 more
Caused by: java.lang.ClassFormatError: Duplicate method name&signature in class file cpw/mods/fml/common/FMLContainer
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
	... 12 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 1.7.10
	Operating System: Linux (amd64) version 2.6.32-042stab105.14
	Java Version: 1.8.0_05, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 893230768 bytes (851 MB) / 2034237440 bytes (1940 MB) up to 5358223360 bytes (5110 MB)
	JVM Flags: 11 total; -XX:+OptimizeStringConcat -XX:OnOutOfMemoryError=curl https://api.creeper.host/callbacks/minecraft/outofmemory.php?instance=mc-55e9067e73cb4 -k -XX:OnError=curl https://api.creeper.host/callbacks/minecraft/crash.php?instance=mc-55e9067e73cb4 -k -XX:-UseCompressedOops -Xmx5838M -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10 -XX:ParallelGCThreads=5 -XX:+AggressiveHeap -XX:+AggressiveOpts -XX:MaxMetaspaceSize=512M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1448 1 mod loaded, 0 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
		mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
	Profiler Position: N/A (disabled)
	Is Modded: Definitely; Server brand changed to 'fml,forge'
	Type: Dedicated Server (map_server.txt)