Update CategoryProcessor.php

Author: ulftietze

app/code/Magento/CatalogImportExport/Model/Import/Product/CategoryProcessor.php

@@ -112,6 +112,9 @@ protected function createCategory($name, $parentId)
         if (!($parentCategory = $this->getCategoryById($parentId))) {
             $parentCategory = $this->categoryFactory->create()->load($parentId);
         }
+        
+        // Set StoreId to 0 to generate URL Keys global and prevent generating url rewrites just for default website
+        $category->setStoreId(0);
         $category->setPath($parentCategory->getPath());
         $category->setParentId($parentId);
         $category->setName($name);