🔍 Overview
If OTTO Pixel reports a duplicate installation error but you can only find the script once on your site, the issue is almost always related to how or where the script was installed — not necessarily how many times you intentionally added it. This article walks you through the most common causes and how to resolve them.
⚠️ Why the Duplicate Error Appears
OTTO Pixel scans the rendered version of your page rather than just your source code editor. A single script block can appear more than once in the rendered output for several reasons:
- Theme or plugin conflicts: A WordPress theme, page builder, or plugin may cause any injected script to be output more than once.
- Caching layers: Stale cached versions of your page can cause an outdated copy of the script to appear alongside the current one.
- Custom code placement: If the snippet was added to both a global custom code field and a page-specific field, it may fire twice even though it looks like one entry.
- Search term mismatch: Searching your source for the script string may return zero results if the installed version is minified or encoded differently. Always search for the full script string exactly as it appears in your installed code.
🔎 How to Check for True Duplicates
- Review every location where the OTTO Pixel script could have been added — global header/footer fields, page-specific custom code fields, any header/footer plugins, and any tag manager configurations.
- Look for the script string in each location individually. If it appears in more than one place, you have a true duplicate.
- If you cannot find a duplicate in your editor but the error persists, check whether a caching plugin or CDN may be serving a stale version of the page that still contains an old copy of the script.
🧹 How to Resolve the Duplicate
- Remove all existing instances of the OTTO Pixel script from your site, including custom code fields, header/footer plugins, and any tag manager tags.
- Clear all caches — server cache, CDN cache, and browser cache — before re-checking.
- Re-install the script in one location only. The recommended method is via your site's global custom code or header field. Do not add it through multiple channels simultaneously.
- Verify the fix by returning to OTTO and re-running the pixel check to confirm the duplicate error is resolved.
If you need further assistance, open the chat widget in the bottom-right corner of the platform and type human teammate to be connected with a member of our team.