[10:13:55] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.IllegalArgumentException: Multiple entries with same key: CommandSigns=SpongePlugin:CommandSigns{0.6} and CommandSigns=SpongePlugin:CommandSigns{0.7}
        at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:150) ~[minecraft_server.1.8.jar:?]
        at com.google.common.collect.RegularImmutableMap.checkNoConflictInBucket(RegularImmutableMap.java:104) ~[minecraft_server.1.8.jar:?]
        at com.google.common.collect.RegularImmutableMap.<init>(RegularImmutableMap.java:70) ~[minecraft_server.1.8.jar:?]
        at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:254) ~[minecraft_server.1.8.jar:?]
        at com.google.common.collect.Maps.uniqueIndex(Maps.java:1166) ~[minecraft_server.1.8.jar:?]
        at com.google.common.collect.Maps.uniqueIndex(Maps.java:1140) ~[minecraft_server.1.8.jar:?]
        at net.minecraftforge.fml.common.Loader.identifyMods(Loader.java:360) ~[Loader.class:?]
        at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:483) ~[Loader.class:?]
        at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87) ~[FMLServerHandler.class:?]
        at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:355) ~[FMLCommonHandler.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117) ~[po.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438) [MinecraftServer.class:?]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
[10:13:55] [Server thread/ERROR]: This crash report has been saved to: D:\Programming\Plugin Testing Server\.\crash-reports\crash-2015-11-28_10.13.55-server.txt