How to change the grafana email notification template subject

I have configured email alerts in grafana, but I’m getting an email notification with subject containing CAUTION keyword irrespective of the scenarios, which is quite sometimes misleading.

Also, any test email I receive while testing the notification channel also has a CAUTION keyword in the subject line.

I’m suing grafana version: 5.2.0

So is there a configuration which can be editable?