ng-monitoring can't scrape CPU profile

[giant-panda666]

1. At first, ng-monitoring is deployed in namespace A. And then, the continuous profiling is enabled on tidb dashboard.
2. i want ng-monitoring and tidb dashboard to deployed in namespace B. So i deleted the tidbNGMonitoring and tidbDashboard. After change the namespace of them to namespace B, i apply them to k8s.
3. After tidb dashboard and ng-monitoring is running, i enable the continuous profiling on tidb dashboard. but some failed occured:
   
   
4. what i see in tikv logs is: "Already in CPU Profiling". So is it the ng-monitoring make tikv in CPU Profiling before i delete, and make ng-monitoring can't scrape after recreated?