diff --git a/server.js b/server.js
index 875a3ae..9de024e 100644
--- a/server.js
+++ b/server.js
@@ -27,7 +27,6 @@ app.use(express.json({ limit: '50mb' }));
 app.use(express.static(__dirname));
 
 // Helper to run the schema isolation command
-// This ensures all subsequent queries in this client session use the specified schema
 async function setSchema(client) {
   const schema = process.env.DB_SCHEMA || 'wind_projekt_bwscheddebrock';
   await client.query(`SET search_path TO "${schema}", public;`);
@@ -40,8 +39,7 @@ const initDBData = async () => {
     await setSchema(client);
     console.log(`Prüfe Datenbank-Schema (Schema: ${process.env.DB_SCHEMA})...`);
     
-    // Ensure id_0 is BIGINT
-    await client.query('ALTER TABLE "Kabeltrasse" ALTER COLUMN id_0 TYPE BIGINT');
+    // id_0 check removed as requested (column is 'id')
 
     // Enforce SRID 25832 and LineString type
     try {
@@ -59,7 +57,7 @@ const initDBData = async () => {
         await client.query(`
             DELETE FROM "Kabeltrasse" a
             USING "Kabeltrasse" b
-            WHERE a.id_0 < b.id_0 AND a."Variante" = b."Variante"
+            WHERE a.id < b.id AND a."Variante" = b."Variante"
         `);
     } catch(e) { console.warn("Cleanup warning:", e.message); }
 
@@ -105,7 +103,7 @@ app.get('/api/owners', async (req, res) => {
         const geomObj = typeof geometry === 'string' ? JSON.parse(geometry) : geometry;
         return {
           type: "Feature",
-          id: row.id || row.id_0,
+          id: row.id,
           geometry: geomObj,
           properties: properties
         };
@@ -125,8 +123,6 @@ app.get('/api/usage', async (req, res) => {
   const client = await pool.connect();
   try {
     await setSchema(client);
-    const countRes = await client.query('SELECT count(*) FROM "Nutzung"');
-    
     const query = `
       SELECT 
         *, 
@@ -237,14 +233,12 @@ app.get('/api/variants', async (req, res) => {
   const client = await pool.connect();
   try {
     await setSchema(client);
-    const countRes = await client.query('SELECT count(*) FROM "Kabeltrasse"');
-
     const query = `
       SELECT 
-        id_0 as id, name, "Variante",
+        id, name, "Variante",
         ST_AsGeoJSON(ST_Transform(ST_SetSRID(geom, 25832), 4326)) as geometry
       FROM "Kabeltrasse"
-      ORDER BY id_0 DESC
+      ORDER BY id DESC
     `;
     const result = await client.query(query);
     
@@ -295,11 +289,11 @@ app.post('/api/variants', async (req, res) => {
       DO UPDATE SET 
         geom = EXCLUDED.geom,
         name = EXCLUDED.name
-      RETURNING id_0
+      RETURNING id
     `;
     
     const upsertRes = await client.query(upsertQuery, [geoJsonStr, routeName, variante]);
-    const finalId = upsertRes.rows[0].id_0;
+    const finalId = upsertRes.rows[0].id;
     
     res.json({ success: true, id: finalId });
   } catch (err) {