diff --git a/mqtt/debug_service.go b/mqtt/debug_service.go
index a1207bf..d9aee91 100644
--- a/mqtt/debug_service.go
+++ b/mqtt/debug_service.go
@@ -245,8 +245,15 @@ func (s *DebugService) maybePersist(record interface{}) {
 	if !enabled {
 		return
 	}
-	if err := s.db.Clauses(clause.OnConflict{DoNothing: true}).Create(record).Error; err != nil {
-		log.Printf("mqtt debug persist failed type=%T err=%v", record, err)
+	tx := s.db.Clauses(clause.OnConflict{DoNothing: true}).Create(record)
+	if tx.Error != nil {
+		log.Printf("mqtt debug persist failed type=%T err=%v", record, tx.Error)
+		return
+	}
+	if tx.RowsAffected > 0 {
+		//logPersistResult("mqtt debug", "inserted", record)
+	} else {
+		//logPersistResult("mqtt debug", "skipped duplicate", record)
 	}
 }
 
diff --git a/mqtt/listener.go b/mqtt/listener.go
index 172a809..9111173 100644
--- a/mqtt/listener.go
+++ b/mqtt/listener.go
@@ -231,7 +231,16 @@ func (l *Listener) persistRecord(record interface{}) error {
 	case *models.MqttTrainingSessionRecord:
 		return l.persistTrainingSession(r)
 	default:
-		return l.db.Clauses(clause.OnConflict{DoNothing: true}).Create(record).Error
+		tx := l.db.Clauses(clause.OnConflict{DoNothing: true}).Create(record)
+		if tx.Error != nil {
+			return tx.Error
+		}
+		if tx.RowsAffected > 0 {
+			//logPersistResult("mqtt listener", "inserted", record)
+		} else {
+			//logPersistResult("mqtt listener", "skipped duplicate", record)
+		}
+		return nil
 	}
 }
 
@@ -255,10 +264,34 @@ func (l *Listener) persistTrainingSession(record *models.MqttTrainingSessionReco
 		assignments["ended_at"] = *record.EndedAt
 	}
 
-	return l.db.Clauses(clause.OnConflict{
+	tx := l.db.Clauses(clause.OnConflict{
 		Columns:   []clause.Column{{Name: "identifier"}},
 		DoUpdates: clause.Assignments(assignments),
-	}).Create(record).Error
+	}).Create(record)
+	if tx.Error != nil {
+		return tx.Error
+	}
+	if tx.RowsAffected > 0 {
+		//logPersistResult("mqtt listener", "upserted", record)
+	} else {
+		//logPersistResult("mqtt listener", "skipped duplicate", record)
+	}
+	return nil
+}
+
+func logPersistResult(source, action string, record interface{}) {
+	switch r := record.(type) {
+	case *models.MqttHeartRateRecord:
+		log.Printf("%s %s heart_rate region=%d addr=%s hr=%d packet=%d identifier=%s topic=%s", source, action, r.RegionID, r.BeltAddr, r.HeartRate, r.PacketNum, r.Identifier, r.Topic)
+	case *models.MqttStepCountRecord:
+		log.Printf("%s %s step_count region=%d addr=%s steps=%d packet=%d identifier=%s topic=%s", source, action, r.RegionID, r.BeltAddr, r.StepCount, r.PacketNum, r.Identifier, r.Topic)
+	case *models.MqttGatewayStatusRecord:
+		log.Printf("%s %s gateway_status region=%d gateway=%s rxCount=%d uptimeMs=%d identifier=%s topic=%s", source, action, r.RegionID, r.GatewayMAC, r.RxCount, r.UptimeMs, r.Identifier, r.Topic)
+	case *models.MqttTrainingSessionRecord:
+		log.Printf("%s %s training_session region=%d testId=%s event=%s identifier=%s publishedAt=%d topic=%s", source, action, r.RegionID, r.TestID, r.EventType, r.Identifier, r.PublishedAt, r.Topic)
+	default:
+		log.Printf("%s %s record type=%T", source, action, record)
+	}
 }
 
 func buildHeartRateRecord(measurement *whgw_hrpb.HrMeasurement, topic string, now int64) models.MqttHeartRateRecord {
@@ -274,7 +307,7 @@ func buildHeartRateRecord(measurement *whgw_hrpb.HrMeasurement, topic string, no
 	beltAddr := fmt.Sprintf("%d-%d", regionID, packet.GetId())
 
 	return models.MqttHeartRateRecord{
-		Identifier:           fmt.Sprintf("hr:%d:%s:%d:%d", regionID, gatewayMAC, packet.GetId(), packet.GetPacketNum()),
+		Identifier:           fmt.Sprintf("hr:%d:%s:%d:%d", regionID, gatewayMAC, packet.GetId(), now),
 		Topic:                topic,
 		RegionID:             regionID,
 		GatewayMAC:           gatewayMAC,
@@ -318,7 +351,7 @@ func buildStepCountRecord(measurement *whgw_hrpb.StepCountMeasurement, topic str
 	beltAddr := fmt.Sprintf("%d-%d", regionID, packet.GetId())
 
 	return models.MqttStepCountRecord{
-		Identifier:           fmt.Sprintf("step:%d:%s:%d:%d", regionID, gatewayMAC, packet.GetId(), packet.GetPacketNum()),
+		Identifier:           fmt.Sprintf("step:%d:%s:%d:%d", regionID, gatewayMAC, packet.GetId(), now),
 		Topic:                topic,
 		RegionID:             regionID,
 		GatewayMAC:           gatewayMAC,