Setting different trheshold and description on the same dashboard

I have a grafana dashboard with both servers how can i set differents threshold for each server !
i set an alert for server 1 to notify me when the cpu is > 85 % with a description ‘‘cpu of server1 is above 85’’
But when the cpu of the server 2 is > 85% i got the same description on my email ?
How can i solve that