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)