The VisitorAPI.js must be loaded before at.js. If you are updating an existing at.js file, make sure that you verify the load order.

Ensure to Include at.js below VisitorAPI.js

The default setting for Target and Analytics integration, from an implementation perspective, is to use the SDID that is passed from the page to stitch the Target and Analytics request together on the backend automatically.

*The SDID is the Supplemental Data ID and it is actually designed to change on each hit. What is important is that it matches at the hit level between the different solutions deployed on that page.

The Correct Load Order is:

1. VisitorAPI.js
2. at.js
3. Appemeasuremnt.js

If the order is not correct the main issue is data mismatch between different solutions.

To avoid this issue related to ordering alloy.js library is been brought in place which is AEP Web SDK.

Adobe Experience Platform Web SDK replaces the following SDKs:

• Visitor.js
• AppMeasurement.js
• AT.js
• DIL.js