Cannot remove App Privacy after removing AdMob and tracking

I wanted to remove AdMob from my iOS app, so I remove all traces of AdMob, and make sure that info.plist does not have NSUserTrackingUsageDescription, no external framework used, and no traces of NSUserTrackingUsageDescription in my codes (global search in Xcode not found).

However, previous version has setup App Privacy in AppStore Connect.

Uploading a new build I can remove all entries in App Privacy except for one (?): Data Types - 1 data type collected from this app: Product Interaction

And I cannot remove this one: when selecting not collecting info, I got this error message:
Code Block
Your app contains NSUserTrackingUsageDescription, indicating that you will request permission to track users. You must indicate which data types are tracking users. If this is incorrect, update your app binary and upload a new build to App Store Connect.

What shall I do? And what is this Product Interaction tracking? (The rest can all be reset to not tracking except this one.)

I have the same issue.And the application does not pass Revision, when I look at the form, the same problem has been going on for 9 months, the application is still rejected.I guess no one looks at the form, except for one answer, there is no official answer either

Cannot remove App Privacy after removing AdMob and tracking
 
 
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