worldguard Błąd WorldGuard

podczas używania komędy /rg define wyskakuje mi błąd
KONSOLA

[19:57:54 INFO]: Syntetik008 issued server command: /rg define stoniarki1
[19:57:54 WARN]: [WorldGuard] WorldGuard encountered an unexpected error
java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkState(ZLjava/lang/String;Ljava/lang/Object;)V
at com.sk89q.worldguard.internal.guava.util.concurrent.Futures.getDone(Futures.java:1170) ~[worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.Futures$4.run(Futures.java:1121) [worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:435) [worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:900) [worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.AbstractFuture.complete(AbstractFuture.java:811) [worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.AbstractFuture.set(AbstractFuture.java:653) [worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:111) [worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:58) [worldguard-6.2.1.jar:?]
at com.sk89q.worldguard.internal.guava.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:75) [worldguard-6.2.1.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_141]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_141]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_141]