shuffle fails with NumberFormatException

INFO 12:42:56,906 Removing RELOCATION state for /10.0.0.3 -6470120033327209844
INFO 12:46:41,656 Enabling scheduled transfers of token ranges
INFO 12:46:41,656 Initiating transfer of -6730365637522478358 (scheduled at Sun
Sep 15 12:41:14 CEST 2013)
WARN 12:46:41,656 cannot move -6730365637522478358; source and destination match
WARN 12:46:41,656 no valid token arguments specified; nothing to relocate
ERROR 12:46:41,656 Error removing -6730365637522478358: java.lang.NumberFormatException: For input string: ""
ERROR 12:46:41,875 Exception in thread Thread[GossipStage:1,5,main]
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.
java:65)
at java.lang.Long.parseLong(Long.java:453)
at java.lang.Long.valueOf(Long.java:540)
at org.apache.cassandra.dht.Murmur3Partitioner$1.fromString(Murmur3Parti
tioner.java:183)
at org.apache.cassandra.service.StorageService.handleStateRelocating(Sto
rageService.java:1490)
at org.apache.cassandra.service.StorageService.onChange(StorageService.j
ava:1180)
at org.apache.cassandra.gms.Gossiper.doNotifications(Gossiper.java:956)
at org.apache.cassandra.gms.Gossiper.applyNewStates(Gossiper.java:947)
at org.apache.cassandra.gms.Gossiper.applyStateLocally(Gossiper.java:905
)
at org.apache.cassandra.gms.GossipDigestAckVerbHandler.doVerb(GossipDige
stAckVerbHandler.java:57)
at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.
java:56)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:615)
at java.lang.Thread.run(Thread.java:724)