Rancher upgrade 2.7.4 - 2.9.3

Hello guys i want to upgrade rancher 2.7.4 to 2.9.3
i’ve already connected 5 kubernetes clusters .
my rancher works in docker container what do i need to do?
my prevs connected nodes will dissapear?
do i need to configure one by one again?

Your connected Kubernetes clusters will remain intact. You won’t need to reconfigure them individually. The upgrade process primarily focuses on updating the Rancher server itself, which manages and interacts with these clusters.

Make sure the clusters are using supported kubernetes version (see rancher support matrix) to avoid surprises.