Minecraft 14w28a Dedicated server crashes

I have a dedicated server hosted on my computer and i'm playing there with couple of my friends, it worked fine for couple days but then this came up when trying to join

Minecraft Crash Report ----
// But it works on my machine.

Time: 10.7.2014 12:07
Description: Exception ticking world

java.lang.IllegalArgumentException: Cannot get property bcl{name=age, clazz=class java.lang.Integer, values=[0, 1, 2, 3, 4, 5, 6, 7]} as it does not exist!
at bbw.b(SourceFile:91)
at ayt.b(SourceFile:127)
at ayt.c(SourceFile:69)
at ary.b(SourceFile:416)
at qg.h(SourceFile:373)
at qg.c(SourceFile:199)
at net.minecraft.server.MinecraftServer.x(SourceFile:578)
at pd.x(SourceFile:285)
at net.minecraft.server.MinecraftServer.w(SourceFile:510)
at net.minecraft.server.MinecraftServer.run(SourceFile:426)
at java.lang.Thread.run(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at bbw.b(SourceFile:91)
at ayt.b(SourceFile:127)
at ayt.c(SourceFile:69)
at ary.b(SourceFile:416)
at qg.h(SourceFile:373)
at qg.c(SourceFile:199)

– Affected level –
Details:
Level name: world
All players: 1 total; [qj['Soul_Runner'/227, l='world', x=-442,50, y=69,00, z=39,50]]
Chunk stats: ServerChunkCache: 761 Drop: 0
Level seed: -782663572
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: 136,00,64,00,224,00 - World: (136,64,224), Chunk: (at 8,4,0 in 8,14; contains blocks 128,0,224 to 143,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 389457 game time, 435258 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 163454 (now: false), thunder time: 173490 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.x(SourceFile:578)
at pd.x(SourceFile:285)
at net.minecraft.server.MinecraftServer.w(SourceFile:510)
at net.minecraft.server.MinecraftServer.run(SourceFile:426)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 14w28a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_55, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 602028880 bytes (574 MB) / 724041728 bytes (690 MB) up to 1901592576 bytes (1813 MB)
JVM Flags: 0 total;
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 1 / 20; [qj['Soul_Runner'/227, l='world', x=-442,50, y=69,00, z=39,50]]
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)