message: Not upsert charging station when updating last seen
diff: @@ -567,8 +567,7 @@ export default class ChargingStationStorage {
  // Modify and return the modified document
  await global.database.getCollection<ChargingStation>(tenantID, 'chargingstations').findOneAndUpdate(
  { '_id': id },
  - { $set: params },
  - { upsert: true });
  + { $set: params });
  // Debug
  Logging.traceEnd(tenantID, MODULE_NAME, 'saveChargingStationLastSeen', uniqueTimerID, params);
  }
  