For the past week of so, whenever I try to open any minecraft with forge, It wont open anything.

 

I have been getting this message

 

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[16:48:46] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[16:48:46] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker

[16:48:46] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker

[16:48:46] [main/INFO] [FML]: Forge Mod Loader version 7.10.25.1208 for Minecraft 1.7.10 loading

[16:48:46] [main/INFO] [FML]: Java is Java HotSpot Client VM, version 1.8.0_25, running on Windows 8.1:x86:6.3, installed at C:\Program Files (x86)\Java

[16:48:46] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[16:48:46] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker

[16:48:46] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

[16:48:46] [main/ERROR] [LaunchWrapper]: Unable to launch

java.util.ConcurrentModificationException

  at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_25]

  at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_25]

  at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]

  at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

Java HotSpot Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

 

 

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Thank you, and hope to have it solved soon

Update Forge and read the EAQs -.-