Why are 2 entries added to the database instead of 1?

Question

Yii

Good afternoon, I can not catch a double entry in the database.

В контроллере:
VisitService::newVisit();

в Визит сервисе:
public static function newVisit($page_id){
            $model = new Statistics();
            $model->load(self::getPlaceholder($page_id), '');
            self::saveVisit($model);
    }
private static function saveVisit($model){
        if($model->validate() && $model->save()){
            \Yii::debug('сохранение визита'); // пытаюсь посмотреть сколько раз будет в логах
            return true;
        }
        return false;
    }

As a result, the newVisit method is called 1 time, in 1 place, in the logs "saving the visit" also 1 time.
In the request debugger, there is only 1 such entry, it also has Duplicated = 1:

INSERT INTO `statistics` (`page_id`, `type`, `ip`, `date`) VALUES (42, 0, '127.0.0.1', NOW())

Moreover, records are recorded in a row with a difference of 2 seconds, redirects and other things were not found.
Please tell me where to look and what can be in general?

Answer 1

Does the table have a primary key?
in general, insert or update - is determined on the basis of null === $_oldAttributes
it is filled during insert if there is a PC in the table.
if there is no PC and it cannot be added, you need to define your own getIsNewRecord() for the model and store some flag as an additional condition.