--- a/services/healthreport/healthreporter.jsm
+++ b/services/healthreport/healthreporter.jsm
@@ -280,17 +280,17 @@ HealthReporterState.prototype = Object.f
       if (lastPingDate && lastPingDate.getTime() > ourLast.getTime()) {
         this._log.info("Migrating last ping time: " + lastPingDate);
         this._s.lastPingTime = lastPingDate.getTime();
       }
 
       yield this.save();
       prefs.reset(["lastSubmitID", "lastPingTime"]);
     } else {
-      this._log.warn("No prefs data found.");
+      this._log.debug("No prefs data found.");
     }
   },
 });
 
 /**
  * This is the abstract base class of `HealthReporter`. It exists so that
  * we can sanely divide work on platforms where control of Firefox Health
  * Report is outside of Gecko (e.g., Android).