unable to remove a single instance from pmm-client

I’ve added 10 RDS instances to pmm-client. Now, I wanted to remove two instances from them.
I’m using pmm-admin rm mysql hostname. It’s showing that no metrics for that instance are under monitoring. But, when I do pmm-admin list, the running state still showing YES.
Is there any way, we can remove entire instance from pmm-client. I mean, it should not show in QAN window and in grafana.

The syntax is pmm-admin rm mysql NAME where name is what’s shown under NAME column on pmm-admin list output.