Is it possible to change the

cluster-cidr

of an existing cluster? I have a cluster created with --cluster-cidr=192.168.0.0/16 but due to some conflicts I want it to be --cluster-cidr=172.16.0.0/16 but that makes the k3s service to restart frequently due to a panic:

Mar 31 05:04:34 my-node k3s[1059813]: panic: F0331 05:04:34.864500 1059813 controllermanager.go:222] error starting controllers: failed to mark cidr[192.168.0.0/24] at idx [0] as occupied for node: my-node: cidr 192.168.0.0/24 is out the range of cluster cidr 172.16.0.0/16

No, you effectively cannot change the cidrs after the cluster has been started. You should build a new cluster.