Re-join Master node after 1 day

a cluster with 3 Master + 1 worker node on K3s

1 master gone out due to power outage and it took 1 day to recover it, and in the mean while I had added another Master in the cluster


Can I re-join the old master-1 to the same cluster without re-installing it?

best if you can help on RKE2 or K3s specific env only.