From dbbb6f9ca2abdd554d350967842e6d9ba332fed4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benedikt=20R=C3=B6tsch?= <opensource@axe312.dev>
Date: Thu, 22 Apr 2021 18:32:14 +0200
Subject: [PATCH] fix issue with warm builds

---
 packages/gatsby-source-contentful/src/normalize.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/gatsby-source-contentful/src/normalize.js b/packages/gatsby-source-contentful/src/normalize.js
index 6b234c6018bb5..4631bdd1c5e0e 100644
--- a/packages/gatsby-source-contentful/src/normalize.js
+++ b/packages/gatsby-source-contentful/src/normalize.js
@@ -82,7 +82,7 @@ exports.buildResolvableSet = ({
 }) => {
   const resolvable = new Set()
   existingNodes.forEach(node => {
-    if (node.internal.owner === `gatsby-source-contentful` && node.sys.id) {
+    if (node.internal.owner === `gatsby-source-contentful` && node?.sys?.id) {
       // We need to add only root level resolvable (assets and entries)
       // Derived nodes (markdown or JSON) will be recreated if needed.
       resolvable.add(generateReferenceId(node))