Proxmox 5 - node cluster problem...

I have a problem on a node of my 5 cluster nodes.

If I try to migrate a VM from nodes 4 to 5 I have this error:

"no such cluster node 'pmx5' (500)"

pvecm status and pvecm nodes is OK in all 5 nodes.

I found a problem on /etc/pve/.members on node 4:

root@pmx4:~# cat /etc/pve/.members
{
"nodename": "pmx4",
"version": 26,
"cluster": { "name": "CLUSTER", "version": 4, "nodes": 4, "quorate": 1 },
"nodelist": {
"pmx3": { "id": 1, "online": 1, "ip": "192.168.198.14"},
"pmx2": { "id": 3, "online": 1, "ip": "192.168.198.12"},
"pmx1": { "id": 4, "online": 1, "ip": "192.168.198.13"},
"pmx4": { "id": 2, "online": 1, "ip": "192.168.198.16"}
}
}

UNLIKE all the other nodes, here in node 4, entry for node 5 is missing...

How can I solve this?

Thanks in advance...

 

Anyone?
There is a way to remove ad re-add the node in the cluster???