Catch duplicate entry Exception

I use spring so we resolve it by org.springframework.dao.DataIntegrityViolationException

try { AoHistory(..));
} catch (DataIntegrityViolationException e) {
    System.out.println("history already exist");

But as @KevinGuancheDarias mention it:

Please note that while this works. I suggest to solve the problem by
issuing a findBy before the save
, as this is messy, and I think it’s
not warranted that it will work in future versions, may even break
without notification.

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