Follow the below steps
unmount all filesystem assocated with the VG:
#umount <mount_point>
deactivate the cluster VG:
#vgchange –a n HAVG_<vgname>
Remove all hostname tags from the VG:
#vgchange –-deltag <server_name>.testdoamin.com HAVG_<vgname>
unmount all filesystem assocated with the VG:
#umount <mount_point>
deactivate the cluster VG:
#vgchange –a n HAVG_<vgname>
Remove all hostname tags from the VG:
#vgchange –-deltag <server_name>.testdoamin.com HAVG_<vgname>