diff --git a/src/App.tsx b/src/App.tsx
index 112dd16..66d7af2 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -135,7 +135,27 @@ export default function App() {
           console.log('Fetching synced data from Supabase...');
           const syncedData = await getAllSyncedRows();
           
-          const resolvedCols = resolveColumnIndices(headers);
+          // Extend headers with virtual columns if the Excel is shorter than the saved data.
+          // COLUMNS hardcoded indices (PRODUCT_TYPE=103, ITEM_TO_LOGISTIC=104, etc.) are used
+          // by older saved rows — ensure headers covers them so the merge and render work.
+          const extendedHeaders = [...headers];
+          const VIRTUAL_COLS: Record<number, string> = {
+            [COLUMNS.VERIFIED_DIMS]: 'Verified Dims',
+            [COLUMNS.VALIDATED_CHECK]: 'Validated',
+            [COLUMNS.VALIDATED_NOTE]: 'Note',
+            [COLUMNS.PRODUCT_TYPE]: 'TYPE',
+            [COLUMNS.ITEM_TO_LOGISTIC]: 'Item to Logistic',
+            [COLUMNS.ANNA_CHECK]: 'Anna Check',
+            [COLUMNS.ANNA_NOTE]: 'Anna Note',
+          };
+          Object.entries(VIRTUAL_COLS).forEach(([idxStr, name]) => {
+            const idx = Number(idxStr);
+            if (extendedHeaders[idx] === undefined) {
+              extendedHeaders[idx] = name;
+            }
+          });
+
+          const resolvedCols = resolveColumnIndices(extendedHeaders);
           const editableColumns = new Set([
             resolvedCols.CLASSIFICATION,
             resolvedCols.LONG_DE, resolvedCols.LONG_EN, 
@@ -187,7 +207,7 @@ const articleNoIdx = resolvedCols.ARTICLE_NO;
             
             return finalRow.map((val: any, idx: number) => {
               if (val === undefined || val === null || val === '') return val;
-              const header = (headers[idx] || '').toLowerCase();
+              const header = (extendedHeaders[idx] || '').toLowerCase();
                
                if ((header.includes('id') || header.includes('no') || header.includes('code') ||
                  header.includes('art.') || header.includes('barcode') || header.includes('article')) &&
@@ -213,12 +233,12 @@ const articleNoIdx = resolvedCols.ARTICLE_NO;
             });
           });
           
-          const asinIdx = (headers as string[]).findIndex((h: string) => 
+          const asinIdx = (extendedHeaders as string[]).findIndex((h: string) =>
             String(h).toLowerCase().trim() === 'asin'
           );
-          
+
           setAppState({
-            headers: headers,
+            headers: extendedHeaders,
             data: processedRows,
             fileName: 'Data-Matrix.xlsx (Cloud Sync)',
             fileDate: new Date(),