[Crash] Problème de crash du serveur

Bonjour,

J'ai des crashs avec mon serveur Minecraft avec ce type d'erreur:

>16:09:06 [SEVERE] java.lang.NoSuchFieldError: getDayTime
>16:09:06 [SEVERE] at net.minecraft.server.v1_6_R2.EntityPlayer.getPlaye rTime(EntityPlayer.java:883)
>16:09:06 [SEVERE] at net.minecraft.server.v1_6_R2.MinecraftServer.t(Min ecraftServer.java:535)
>16:09:06 [SEVERE] at net.minecraft.server.v1_6_R2.DedicatedServer.t(Ded icatedServer.java:226)
>16:09:06 [SEVERE] at net.minecraft.server.v1_6_R2.MinecraftServer.s(Min ecraftServer.java:486)
>16:09:06 [SEVERE] at net.minecraft.server.v1_6_R2.MinecraftServer.run(M inecraftServer.java:419)
>16:09:06 [SEVERE] at net.minecraft.server.v1_6_R2.ThreadServerApplicati on.run(SourceFile:582)
>16:09:06 [SEVERE] Encountered an unexpected exception NoSuchFieldError
java.lang.NoSuchFieldError: getDayTime
at net.minecraft.server.v1_6_R2.EntityPlayer.getPlaye rTime(EntityPlayer.java:883)
at net.minecraft.server.v1_6_R2.MinecraftServer.t(Min ecraftServer.java:535)
at net.minecraft.server.v1_6_R2.DedicatedServer.t(Ded icatedServer.java:226)
at net.minecraft.server.v1_6_R2.MinecraftServer.s(Min ecraftServer.java:486)
at net.minecraft.server.v1_6_R2.MinecraftServer.run(M inecraftServer.java:419)
at net.minecraft.server.v1_6_R2.ThreadServerApplicati on.run(SourceFile:582)
>16:09:06 [SEVERE] This crash report has been saved to: /home/games/minecraft/openmod/./crash-reports/crash-2013-08-31_16.09.06-server.txt

Je ne sais pas d'où vient le problème sachant que mes plugins sont tous à jour et configuré...

Merci d'avance!