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org.hibernate.AnnotationException: No identifier specified for entity:

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Problem :

 org.hibernate.AnnotationException: No identifier specified for entity:

 Solution:

 You are missing a field annotated with @Id.

 Each @Enitity needs an @Id - this is the primary key in the database.

 If you don't want your entity to be persisted in a separate table, but rather be a part of other entities, you can use @Embeddable instead of @Entity.

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