We need to remove the In App Purchase Product ID from the issue.

1. Go to the page: https://my.appstudio.net and select the issue

2. Click on edit Icon and remove the name of the issue and leave the box blank, If you are doing a free app leave this field blank.

3. Now unpublish and republish the issue after saving the changes.

Note:- On iPad you need to download the app before testing it again.