Hello,
Thank you for your prompt response.
We currently have a Proxmox cluster with three nodes, to which a fourth node is to be added.
Since we want all nodes to be on the same version if possible, I wanted to install the mentioned version in advance.
We cannot yet upgrade to 9.1 because the NVIDIA drivers are not supported there.
I will install the new node with version 9.0 and integrate it into the cluster.
Best regards,
tg6300