--- a/crmd/callbacks.c	2008-10-28 18:14:12.000000000 +0900
+++ b/crmd/callbacks.c	2008-10-31 15:30:16.000000000 +0900
@@ -518,6 +518,10 @@
 			crm_peer_seq, membership->m_instance);
 		CRM_ASSERT(crm_peer_seq <= membership->m_instance);
 		return;
+	} else if(crm_peer_seq == membership->m_instance) {
+		crm_warn("Membership instance ID is the same as before. %llu->%d",
+			crm_peer_seq, membership->m_instance);
+		return;
 	}
 	
 	/*