just started getting this error please advise

[jayer89]

could anyone help me out ive just started to get this error on my console any help would be great.

15.10 21:20:24 [server] SEVERE at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

15.10 21:20:24 [server] SEVERE at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)

15.10 21:20:24 [server] SEVERE at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:135)

15.10 21:20:24 [server] SEVERE at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:134)

15.10 21:20:24 [server] SEVERE at cpw.mods.fml.common.Loader.loadMods(Loader.java:607)

15.10 21:20:24 [server] SEVERE at cpw.mods.fml.common.Loader.preModInit(Loader.java:235)

15.10 21:20:24 [server] SEVERE at cpw.mods.fml.common.modloader.ModLoaderModContainer.preInit(ModLoaderModContainer.java:114)

15.10 21:20:24 [server] SEVERE cpw.mods.fml.common.LoaderException: java.lang.NumberFormatException: For input string: ""

[TwoTails]

I need the full error log, but my best guess is that one for your configs is broken and has a invaild ID in it.