Unable to re-add in-app purchase to app after rejection in iTunesConnect

I created an auto-renewable In-App Purchase (IAP) and added it to the iTunesConnect App (ITC). The app was rejected for missing information for the end user in the AppStore binary and metadata (I had to explain how much it costs, that it automatically updates, etc.). So I added the missing information to the app and metadata ...

TL; DR

... but now I can no longer add the existing IAP to the ITC version of the application.

Detailed walkthrough

... which (hopefully) fixed the problems, then I removed the old assembly (which cleared up the application version error state) and added the fixed assembly instead. IAP under the Features tab still has a red flag; I fixed it by following this tip . I reached further into the belly of the beast and found that the IAP group name also has a red marker next to it. This time I followed this advice and got rid of this error.

The IAP status is now "Pending Review" which I do not fully understand as I cannot submit the IAP for self review (or can I?). Back on the app version page, I can no longer add the IAP to the version (as shown in the first screenshot of this tutorial ).

What should I do now?

• Remove IAP and create a new one?
• Delete the entire app and create a new one?
• Just submit your application and hope the IAP is still available even if it is not shown in the application version details.

EDIT

As mentioned in the comments: my question is not a duplicate of this . There the solution is to add the IAP to the "In-App Purchases" section of the Release Notes page.

I am well aware that this would be a solution. However, my whole question is that this very section is not available to me. I have already followed all the above steps before, but after the application is rejected after this section is gone and so I can no longer add the IAP.

It looks like ITC considers my (single) IAP to be invalid and therefore does not allow me to select it ... and therefore there is no reason for ITC to even show the interface to add the IAP.