False Nodata alerts on grafana

We have configured various alerts for monitors on grafana. But once in a day grafana fires false Nodata alert for our monitors.

     ** Firing **
         Value: [no value]
         Labels:

Although I checked that grafana is able to get data for the monitors but still sometimes it fires a nodata alert for the monitors. Does anybody has any idea on how to resolve these false nodata alerts on grafana ?