Fix the fix :)

Author: Anael Ollier

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

@@ -1333,8 +1333,7 @@ public function saveProductEntity(array $entityRowsIn, array $entityRowsUp)
                 $entityTable,
                 array_merge($this->getNewSkuFieldsForSelect(), $this->getOldSkuFieldsForSelect())
             )->where(
-                'sku IN (?)',
-                $this->_connection->quote(array_keys($entityRowsIn))
+                $this->_connection->quoteInto('sku IN (?)', array_keys($entityRowsIn))
             );
             $newProducts = $this->_connection->fetchAll($select);
             foreach ($newProducts as $data) {