From a9ac11452dfeac20f95a18eb5b6cfd17fdacae4f Mon Sep 17 00:00:00 2001
From: Elian Doran <contact@eliandoran.me>
Date: Fri, 13 Feb 2026 19:32:29 +0200
Subject: [PATCH] fix(relation_map): crash when valid JSON, but missing data
 (closes #8702)

---
 .../src/widgets/type_widgets/relation_map/RelationMap.tsx | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/apps/client/src/widgets/type_widgets/relation_map/RelationMap.tsx b/apps/client/src/widgets/type_widgets/relation_map/RelationMap.tsx
index 96ede43f7c..867fd44d39 100644
--- a/apps/client/src/widgets/type_widgets/relation_map/RelationMap.tsx
+++ b/apps/client/src/widgets/type_widgets/relation_map/RelationMap.tsx
@@ -65,7 +65,7 @@ export default function RelationMap({ note, noteContext, ntxId, parentComponent
             };
         },
         onContentChange(content) {
-            let newData: MapData | null = null;
+            let newData: Partial<MapData> | null = null;
 
             if (content) {
                 try {
@@ -75,7 +75,7 @@ export default function RelationMap({ note, noteContext, ntxId, parentComponent
                 }
             }
 
-            if (!newData) {
+            if (!newData || !newData.notes || !newData.transform) {
                 newData = {
                     notes: [],
                     // it is important to have this exact value here so that initial transform is the same as this
@@ -90,8 +90,8 @@ export default function RelationMap({ note, noteContext, ntxId, parentComponent
                 };
             }
 
-            setData(newData);
-            mapApiRef.current = new RelationMapApi(note, newData, (newData, refreshUi) => {
+            setData(newData as MapData);
+            mapApiRef.current = new RelationMapApi(note, newData as MapData, (newData, refreshUi) => {
                 if (refreshUi) {
                     setData(newData);
                 }