[backend] Correction bug initialisation order Product

backend/controllers/ProductController.php

@@ -112,9 +112,9 @@ class ProductController extends BackendController
 
         if ($model->load(Yii::$app->request->post()) && $model->save()) {
             
-            $lastProductOrder = Product::find()->orderBy('order DESC')->one() ;
+            $lastProductOrder = Product::find()->where('id_producer = :id_producer')->params([':id_producer' => Producer::getId()])->orderBy('order DESC')->one() ;
             if($lastProductOrder) {
-                $model->order = $lastProductOrder->order ++ ;
+                $model->order = ++ $lastProductOrder->order ;
             }
             
             Upload::uploadFile($model, 'photo');