diff --git a/src/App.tsx b/src/App.tsx
index dcf85e3..2d18379 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -186,11 +186,24 @@ export default function App() {
           });
 
 const articleNoIdx = resolvedCols.ARTICLE_NO;
+          const debugProduct = '59272EN';
           const processedRows = rows.map(row => {
             const articleNo = String(row[articleNoIdx]);
             const synced = syncedData[articleNo];
             const hist = historyData[articleNo];
             
+            if (articleNo === debugProduct) {
+              console.log('[DEBUG 59272EN] articleNo from row:', articleNo);
+              console.log('[DEBUG 59272EN] synced exists:', !!synced);
+              console.log('[DEBUG 59272EN] hist exists:', !!hist);
+              if (hist) {
+                console.log('[DEBUG 59272EN] hist[103]:', hist[103]);
+                console.log('[DEBUG 59272EN] hist length:', hist.length);
+              }
+              console.log('[DEBUG 59272EN] historyData keys count:', Object.keys(historyData).length);
+              console.log('[DEBUG 59272EN] historyData has key?:', debugProduct in historyData);
+            }
+            
             // Start with fresh Dropbox values (prices from Excel)
             let finalRow = [...row];
             
diff --git a/src/lib/supabase.ts b/src/lib/supabase.ts
index 114122c..3ba8c8f 100644
--- a/src/lib/supabase.ts
+++ b/src/lib/supabase.ts
@@ -206,6 +206,8 @@ export async function getHistoryDataForMerge(): Promise<Record<string, ExcelRow>
       return {};
     }
     const entries: Array<{ product_id: string; new_data: ExcelRow }> = await response.json();
+    console.log('[getHistoryDataForMerge] Raw entries:', entries.length);
+    console.log('[getHistoryDataForMerge] Has 59272EN?:', entries.some(e => e.product_id === '59272EN'));
     
     const result: Record<string, ExcelRow> = {};
     const seen = new Set<string>();
@@ -216,6 +218,11 @@ export async function getHistoryDataForMerge(): Promise<Record<string, ExcelRow>
         result[entry.product_id] = entry.new_data;
       }
     }
+    console.log('[getHistoryDataForMerge] Deduplicated count:', Object.keys(result).length);
+    console.log('[getHistoryDataForMerge] result[59272EN]?:', !!result['59272EN']);
+    if (result['59272EN']) {
+      console.log('[getHistoryDataForMerge] result[59272EN][103]:', result['59272EN'][103]);
+    }
     return result;
   } catch (error: any) {
     console.error('[getHistoryDataForMerge] Exception:', error.message);