How can I limit a node to one job

I issued the following command, but I don’t see a change on the node:

[root@smaster1 ~]# qmgr -c “s n compute-0-1 max_running=1”
[root@smaster1 ~]# pbsnodes compute-0-1
compute-0-1
Mom = compute-0-1.local
Port = 15002
pbs_version = 14.1.2
ntype = PBS
state = offline
pcpus = 40
max_running = 1
resources_available.arch = linux
resources_available.host = compute-0-1
resources_available.mem = 131744464kb
resources_available.ncpus = 40
resources_available.vnode = compute-0-1
resources_assigned.accelerator_memory = 0kb
resources_assigned.mem = 0kb
resources_assigned.naccelerators = 0
resources_assigned.ncpus = 0
resources_assigned.netwins = 0
resources_assigned.vmem = 0kb
resv_enable = True
sharing = default_shared

[root@smaster1 ~]#

You can see this attribute set by running pbnsodes compute-0-1 | grep max_running