SurvivalGames X error

[08:35:53] [Server thread/WARN]: [SurvivalGames] Task #104 for SurvivalGames v1.0.7 generated an exception
java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926) ~[?:1.7.0_45]
	at java.util.HashMap$KeyIterator.next(HashMap.java:960) ~[?:1.7.0_45]
	at net.shockverse.survivalgames.core.Language.insertVariables(Language.java:1372) ~[?:?]
	at net.shockverse.survivalgames.core.Language.getLanguage(Language.java:1154) ~[?:?]
	at net.shockverse.survivalgames.core.Language.getLanguage(Language.java:1148) ~[?:?]
	at net.shockverse.survivalgames.GameManager.updateScoreBoards(GameManager.java:379) ~[?:?]
	at net.shockverse.survivalgames.GameManager.update(GameManager.java:197) ~[?:?]
	at net.shockverse.survivalgames.GameManager.access$000(GameManager.java:35) ~[?:?]
	at net.shockverse.survivalgames.GameManager$1.run(GameManager.java:140) ~[?:?]
	at net.shockverse.survivalgames.extras.GameTask$1.run(GameTask.java:55) ~[?:?]
	at org.bukkit.craftbukkit.v1_7_R2.scheduler.CraftTask.run(CraftTask.java:58) ~[spigot-1.7.5-R0.1-SG3.jar:git-Spigot-1387]
	at org.bukkit.craftbukkit.v1_7_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345) [spigot-1.7.5-R0.1-SG3.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.MinecraftServer.v(MinecraftServer.java:620) [spigot-1.7.5-R0.1-SG3.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:273) [spigot-1.7.5-R0.1-SG3.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:568) [spigot-1.7.5-R0.1-SG3.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:474) [spigot-1.7.5-R0.1-SG3.jar:git-Spigot-1387]
	at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618) [spigot-1.7.5-R0.1-SG3.jar:git-Spigot-1387]