After 16.4.1 release Apple no longer allows downgrade to iOS 16.4.
Reference: Apple Stops Signing iOS 16.4 Following iOS 16.4.1 Release, Downgrading No Longer Possible
Recommendations
Developer:
Prevent devices from upgrading if previous versions needed for development.QA engineer:
Prevent devices from upgrading if previous versions needed for testing.PM/DM:
Business as usual.
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