Change Clustername on OCFS2 filesystem

So how to change the cluster on the ocfs2 filesystem??

cluster:
name = 79ebeeb8ae6def22
heartbeat_mode = global
node_count = 4

node:
cluster = 79ebeeb8ae6def22
name = u150gw
number = 0
ip_address = 10.17.200.95
ip_port = 7777

node:
cluster = 79ebeeb8ae6def22
name = u139gw
number = 1
ip_address = 10.17.200.32
ip_port = 7777

node:
cluster = 79ebeeb8ae6def22
name = u154gw
number = 2
ip_address = 10.17.200.33
ip_port = 7777

node:
cluster = 79ebeeb8ae6def22
name = u140gw
number = 3
ip_address = 10.17.200.31
ip_port = 7777

heartbeat:
cluster = 79ebeeb8ae6def22
region = 0004FB00000500006E521CDE86E67998

[root@u139gw /]# mounted.ocfs2 -d
Device Stack Cluster F UUID Label
/dev/sdb o2cb 79ebeeb8ae6def22 G 0004FB00000500006E521CDE86E67998 OVS_POOL_FILESYSTEM