I connected a new node to my cluster as an agent node, and I noticed the agent node k3s version is v1.27. All the rest of my nodes that have been in the cluster for some time now, including my embedded etcd server control plane nodes are all version v1.26 . is it a problem if my agent node is a newer version of k3s then my control plane nodes ? thankyou everyone and have a nice day and weekend.

it’s not ideal but it’ll probably work. If you’re adding new nodes to a cluster, you should be sure to target the existing cluster version when running the install script.