From 3063a2aae645ffc4a6f2c8c70f7a19ddd53cbfde Mon Sep 17 00:00:00 2001
From: Armin Mehinovic <armin@mui.com>
Date: Thu, 11 Jul 2024 20:43:08 +0200
Subject: [PATCH] group row should not be made if serverChildrenCount is
 undefined

---
 packages/x-data-grid-pro/src/utils/tree/insertDataRowInTree.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/x-data-grid-pro/src/utils/tree/insertDataRowInTree.ts b/packages/x-data-grid-pro/src/utils/tree/insertDataRowInTree.ts
index b9ebd6f739545..d006eb177b34e 100644
--- a/packages/x-data-grid-pro/src/utils/tree/insertDataRowInTree.ts
+++ b/packages/x-data-grid-pro/src/utils/tree/insertDataRowInTree.ts
@@ -99,7 +99,7 @@ export const insertDataRowInTree = ({
       // We create a leaf node for the data row.
       if (existingNodeIdWithPartialPath == null) {
         let node: GridLeafNode | GridDataSourceGroupNode;
-        if (serverChildrenCount !== 0) {
+        if (serverChildrenCount !== undefined && serverChildrenCount !== 0) {
           node = {
             type: 'group',
             id,