Refer to the exhibit.

In a FortiSOAR HA cluster, if the former primary node is relegated to a secondary role but is stuck in a Faulted state, it indicates that the node has lost sync or faced a failure during a role change. To restore its functionality, first, you should remove it from the cluster using the csadm ha leave-cluster command. Once it has left the cluster, you can use the csadm ha join-cluster command to re-add the node as a secondary node. This process will allow it to sync back up with the cluster and resume its role as intended​.