diff --git a/invokeai/frontend/web/src/features/nodes/util/node/nodeUpdate.ts b/invokeai/frontend/web/src/features/nodes/util/node/nodeUpdate.ts
index 1851698374..fddd925f02 100644
--- a/invokeai/frontend/web/src/features/nodes/util/node/nodeUpdate.ts
+++ b/invokeai/frontend/web/src/features/nodes/util/node/nodeUpdate.ts
@@ -34,7 +34,9 @@ const getMayUpdateNode = (node: InvocationNode, template: InvocationTemplate): b
  * - Create a new node data object with the latest version of the template.
  * - Recursively merge new node data object into the node to be updated.
  *
- * @param node The node to updated.
+ * The input node is not mutated; a new object is returned.
+ *
+ * @param node The node to be updated.
  * @param template The invocation template to update to.
  * @throws {NodeUpdateError} If the node is not an invocation node.
  */
diff --git a/invokeai/frontend/web/src/features/nodes/util/workflow/validateWorkflow.ts b/invokeai/frontend/web/src/features/nodes/util/workflow/validateWorkflow.ts
index 0b4873467c..f80f8b6eae 100644
--- a/invokeai/frontend/web/src/features/nodes/util/workflow/validateWorkflow.ts
+++ b/invokeai/frontend/web/src/features/nodes/util/workflow/validateWorkflow.ts
@@ -71,7 +71,7 @@ export const validateWorkflow = async (
   const { nodes, edges } = _workflow;
   const warnings: WorkflowWarning[] = [];
 
-  for (const [i, node] of nodes.entries()) {
+  for (const node of nodes) {
     if (!isWorkflowInvocationNode(node)) {
       // We don't need to validate Note nodes or CurrentImage nodes - only Invocation nodes
       continue;
@@ -94,7 +94,7 @@ export const validateWorkflow = async (
     if (getNeedsUpdate(node.data, template)) {
       try {
         const updatedNode = updateNode(node, template);
-        nodes[i] = updatedNode;
+        node.data = updatedNode.data;
       } catch (e) {
         const message = t('nodes.unableToUpdateNode', {
           node: node.id,