You don't need to deleted the tester, but simply terminate the build expiration date.

Enrolling in the Apple Developer Program as an individual Start enrollment Launch the Apple Developer app on the device you want to use for enrollment. Tap the Account tab. Sign in with your Apple ID. This can be different than the Apple ID signed in to your device, but must have two-factor authentication turned on. If prompted, review the Apple Developer Agreement and tap Agree. Tap Enroll Now. Review the program benefits and requirements and tap Continue.

So there is a bug. If, when uploading an application to the store, you checked the box to receive error reports, go to the organizer and see the reports on application crashes. The answer may be there.

You can ignore this warning. The app is loaded into App Store with this warning. It is related to the release of the new version of XCode (13.2). Update Xcode and it should be gone.