EF-894 Fixed category validation

app/Domain/Imports/Writers/Sheets/ProductsSheet.php

@@ -65,6 +65,7 @@ public static function afterSheet(AfterSheet $event): void
                 $validation->setType(DataValidation::TYPE_LIST);
                 $validation->setAllowBlank(false);
                 $validation->setShowDropDown(true);
+                $validation->setShowErrorMessage(true);
                 $validation->setFormula1((string)$thisSheet->categoryId);
 
                 $validation->setSqref("{$columnIndex}2:{$columnIndex}" . self::MAX_ROWS);