Correction interface

Model/Reduction/ReductionCatalogModel.php

     }
 
 
-    public function getProductFamily(): ?ProductFamily
+    public function getProductFamily(): ?ProductFamilyInterface
     {
         return $this->productFamily;
     }
 
-    public function setProductFamily(?ProductFamily $productFamily): self
+    public function setProductFamily(?ProductFamilyInterface $productFamily): self
     {
         $this->productFamily = $productFamily;