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How I treat a Unique field when it’s time to update with Hibernate.
It features duplicate field msg.
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '41987523699' for key 'UK_4yakf5drp3py7vaalfeb1mrv7'
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This is database constraint. Hibernate cannot treat this constraint. What you can do is remove the constraint (be careful with this option) or check if this restricted field already exists before an Insert or update
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A little more about UNIQUE: It is possible to have more than one Primary key in a table?
– Marconi