'pcs stonith add level' fails with "Error: <node> is not currently a node (use --force to override)" in a RHEL 6 cluster

Issue

• When I try to add a stonith level to my node via pcs, it fails saying the node is "not currently a node"

# pcs status
Cluster name: jrummy6p
Last updated: Tue Oct 15 11:58:24 2013
Last change: Tue Oct 15 11:51:45 2013 via cibadmin on jrummy6p-2-clust
Stack: cman
Current DC: jrummy6p-2-clust - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured
2 Resources configured


Online: [ jrummy6p-1-clust jrummy6p-2-clust ]

Full list of resources:

 jrummy6p-1-xvm (stonith:fence_xvm):    Started jrummy6p-1-clust 
 jrummy6p-2-xvm (stonith:fence_xvm):    Started jrummy6p-2-clust 

# pcs stonith level add 1 jrummy6p-1-clust jrummy6p-1-xvm
Error: jrummy6p-1-clust is not currently a node (use --force to override)