diff --git a/services/authService.js b/services/authService.js
index 95633c8..f23570e 100644
--- a/services/authService.js
+++ b/services/authService.js
@@ -128,11 +128,15 @@ function rotateSessionId(oldSessionId, userId) {
     .toISOString().slice(0, 19).replace('T', ' ');
   
   // Delete old session and create new one atomically
-  db.transaction(() => {
-    db.prepare('DELETE FROM sessions WHERE id = ?').run(oldSessionId);
-    db.prepare('INSERT INTO sessions (id, user_id, expires_at) VALUES (?, ?, ?)')
-      .run(newSessionId, userId, expiresAt);
-  })();
+  try {
+    db.transaction(() => {
+      db.prepare('DELETE FROM sessions WHERE id = ?').run(oldSessionId);
+      db.prepare('INSERT INTO sessions (id, user_id, expires_at) VALUES (?, ?, ?)')
+        .run(newSessionId, userId, expiresAt);
+    })();
+  } catch {
+    return null;
+  }
 
   return newSessionId;
 }