[CentOS] CMAN: Cluster membership rejected

Thu Apr 2 19:18:58 UTC 2009
FM <dist-list at LEXUM.UMontreal.CA>

Several machine cannot joint the cluster after a reboot.
Here is a example of the error :

caserta kernel: CMAN: Join request from como.dmz.lexum.pri rejected,
node ID 3 already in use by ancona.dmz.lexum.pri

All cluster.conf are the same (checked with md5sum)

I googled this but did find nothing

Any ideas?