diff --git a/app/code/Magento/Catalog/Controller/Adminhtml/Product/Save.php b/app/code/Magento/Catalog/Controller/Adminhtml/Product/Save.php
index 15154b02dbf8a..03fd93080ee77 100644
--- a/app/code/Magento/Catalog/Controller/Adminhtml/Product/Save.php
+++ b/app/code/Magento/Catalog/Controller/Adminhtml/Product/Save.php
@@ -147,13 +147,13 @@ public function execute()
             } catch (\Magento\Framework\Exception\LocalizedException $e) {
                 $this->_objectManager->get(\Psr\Log\LoggerInterface::class)->critical($e);
                 $this->messageManager->addExceptionMessage($e);
-                $data = $this->persistMediaData($product, $data);
+                $data = isset($product) ? $this->persistMediaData($product, $data) : $data;
                 $this->getDataPersistor()->set('catalog_product', $data);
                 $redirectBack = $productId ? true : 'new';
             } catch (\Exception $e) {
                 $this->_objectManager->get(\Psr\Log\LoggerInterface::class)->critical($e);
                 $this->messageManager->addErrorMessage($e->getMessage());
-                $data = $this->persistMediaData($product, $data);
+                $data = isset($product) ? $this->persistMediaData($product, $data) : $data;
                 $this->getDataPersistor()->set('catalog_product', $data);
                 $redirectBack = $productId ? true : 'new';
             }
diff --git a/app/code/Magento/ConfigurableProduct/view/adminhtml/web/js/variations/variations.js b/app/code/Magento/ConfigurableProduct/view/adminhtml/web/js/variations/variations.js
index be290e49a43c3..e2e0faec3b805 100644
--- a/app/code/Magento/ConfigurableProduct/view/adminhtml/web/js/variations/variations.js
+++ b/app/code/Magento/ConfigurableProduct/view/adminhtml/web/js/variations/variations.js
@@ -407,15 +407,17 @@ define([
          *   - associated_product_ids_serialized.
          */
         serializeData: function () {
-            this.source.data['configurable-matrix-serialized'] =
-                JSON.stringify(this.source.data['configurable-matrix']);
-
-            delete this.source.data['configurable-matrix'];
-
-            this.source.data['associated_product_ids_serialized'] =
-                JSON.stringify(this.source.data['associated_product_ids']);
+            if (this.source.data['configurable-matrix']) {
+                this.source.data['configurable-matrix-serialized'] =
+                    JSON.stringify(this.source.data['configurable-matrix']);
+                delete this.source.data['configurable-matrix'];
+            }
 
-            delete this.source.data['associated_product_ids'];
+            if (this.source.data['associated_product_ids']) {
+                this.source.data['associated_product_ids_serialized'] =
+                    JSON.stringify(this.source.data['associated_product_ids']);
+                delete this.source.data['associated_product_ids'];
+            }
         },
 
         /**