I found that my app's bundleIdentifier is different from my App ID of iTunes. So I want to make new appID, but I can not make App ID having bundleIdentifier 'com.A.B' different from the one of App ID that I already have one :'com.A.C'. So I try to remove one I have but when I tried, it says
An unspecified error occurred.
The App ID 'ABC1D2FG3.com.A.C' appears to be in use by the App Store, so it can not be removed at this time.
So I removed all certificates and provisioning profile belonged to that AppID. But it still says same message.
I think the image is the problem. I set to upload my app, but I don't know how to cancel it.
You need to remove your app from the App Store first.
According to this document, you can only delete your app if it has at least one approved version and is currently in one of the following statuses: