Hibernate Fix DuplicateMappingException

1. Introduction To fix DuplicateMappingException requires that a column only maps to a single field. The org.hibernate.DuplicateMappingException is a runtime exception and is raised whenever a duplicate for a certain type occurs. In this example, I will create a Spring Data JPA project to demonstrate five entities that throw the duplicate column exception and how …

Jun 23, 2025 - 23:20

1. Introduction To fix DuplicateMappingException requires that a column only maps to a single field. The org.hibernate.DuplicateMappingException is a runtime exception and is raised whenever a duplicate for a certain type occurs. In this example, I will create a Spring Data JPA project to demonstrate five entities that throw the duplicate column exception and how …