PIXEL_DUPLICATE_EVENT Duplicate Pixel Event

The same event is firing multiple times per page load, causing inflated conversion counts and inaccurate optimization signals.

What causes this error?

The same event is firing multiple times per page load, causing inflated conversion counts and inaccurate optimization signals.

How to fix it

1. Check firing rules: In your tag manager, ensure the pixel event trigger only fires once per page/action.
2. Deduplicate: If using both client-side pixel and server-side Events API, implement event deduplication using the event_id parameter.
3. Test thoroughly: Use TikTok Pixel Helper to verify each event fires exactly once per user action.