If you've shipped product based on accelerated aging, and your follow-up real time evaluation fails at a time shorter than the labeled expiration of product you have distributed, you do a field action (recall or otherwise) for that product.
That's how it works.
Obviously no one would like that, so accelerated aging testing should be done in accordance with standards and with rigorous care to doing it right...not because that provides an excuse, but rather because many companies' experience is that accelerated aging per the standards with rigorous care is a valid way to evaluate the issue, and is consistent with the follow-up real time testing.
The history of accelerated aging has been gained based on relatively common types of devices and packaging systems. If there is some aspect of your product or packaging that is novel or otherwise gives rise to uncertainty as to whether that history might not apply, you might not want to use an accelerated aging approach until you've done a pre-study to establish that the approach you'll use will be valid.
Or, of course, you can just wait to market your product until you have real time data.