diff --git a/api/debug-db.js b/api/debug-db.js
new file mode 100644
index 0000000..45649d3
--- /dev/null
+++ b/api/debug-db.js
@@ -0,0 +1,26 @@
+import { createClient } from '@supabase/supabase-js';
+
+const SUPABASE_URL = process.env.SUPABASE_URL || 'https://hwithddwaapyhnfwcesj.supabase.co';
+const SUPABASE_KEY = process.env.SUPABASE_SERVICE_KEY || process.env.SUPABASE_ANON_KEY;
+
+const supabase = createClient(SUPABASE_URL, SUPABASE_KEY);
+
+export default async function handler(req, res) {
+  try {
+    const { data: products } = await supabase.from('products').select('*').limit(5);
+    const { data: history } = await supabase.from('products_history').select('*').limit(5);
+    const { count } = await supabase.from('products').select('*', { count: 'exact', head: true });
+    
+    return res.json({
+      productsCount: count,
+      sampleProducts: products,
+      sampleHistory: history,
+      env: {
+        hasUrl: !!process.env.SUPABASE_URL,
+        hasKey: !!process.env.SUPABASE_SERVICE_KEY
+      }
+    });
+  } catch (err) {
+    return res.status(500).json({ error: err.message });
+  }
+}
diff --git a/api/migrate-indices.js b/api/migrate-indices.js
new file mode 100644
index 0000000..ee2506c
--- /dev/null
+++ b/api/migrate-indices.js
@@ -0,0 +1,71 @@
+import { createClient } from '@supabase/supabase-js';
+
+const SUPABASE_URL = process.env.SUPABASE_URL || 'https://hwithddwaapyhnfwcesj.supabase.co';
+const SUPABASE_KEY = process.env.SUPABASE_SERVICE_KEY;
+
+const supabase = createClient(SUPABASE_URL, SUPABASE_KEY);
+
+export default async function handler(req, res) {
+  if (!SUPABASE_KEY) return res.status(500).json({ error: 'Service key missing' });
+
+  try {
+    console.log('Starting migration to shift indices...');
+    
+    // 1. Migrate 'products' table
+    const { data: products } = await supabase
+      .from('products')
+      .select('product_id, data')
+      .eq('status', 'edited'); // Only migrated ones need shifting
+    
+    let pCount = 0;
+    if (products) {
+      for (const p of products) {
+        if (p.data.length >= 13 && (typeof p.data[12] === 'number' || (typeof p.data[12] === 'string' && /^[0-9.]+$/.test(p.data[12])))) {
+          const newData = [...p.data];
+          newData.splice(12, 0, ''); // Insert empty PM Classification
+          await supabase.from('products').update({ data: newData }).eq('product_id', p.product_id);
+          pCount++;
+        }
+      }
+    }
+
+    // 2. Migrate 'products_history' table (optional but good for consistency)
+    const { data: history } = await supabase
+      .from('products_history')
+      .select('id, old_data, new_data');
+    
+    let hCount = 0;
+    if (history) {
+      for (const h of history) {
+        let changed = false;
+        let nOld = h.old_data;
+        let nNew = h.new_data;
+
+        if (nOld && nOld.length >= 13 && (typeof nOld[12] === 'number' || (typeof nOld[12] === 'string' && /^[0-9.]+$/.test(nOld[12])))) {
+          nOld = [...nOld];
+          nOld.splice(12, 0, '');
+          changed = true;
+        }
+        if (nNew && nNew.length >= 13 && (typeof nNew[12] === 'number' || (typeof nNew[12] === 'string' && /^[0-9.]+$/.test(nNew[12])))) {
+          nNew = [...nNew];
+          nNew.splice(12, 0, '');
+          changed = true;
+        }
+
+        if (changed) {
+          await supabase.from('products_history').update({ old_data: nOld, new_data: nNew }).eq('id', h.id);
+          hCount++;
+        }
+      }
+    }
+
+    return res.json({
+      success: true,
+      productsMigrated: pCount,
+      historyMigrated: hCount,
+      message: 'Migration completed successfully. Indices >= 12 shifted by +1.'
+    });
+  } catch (err) {
+    return res.status(500).json({ error: err.message });
+  }
+}