OneToManyException

OneToManyException is an exception that occurs in object-relational mapping (ORM) when there is an attempt to insert or update a record in a database table that violates the one-to-many relationship between two tables. This exception usually occurs when there is an attempt to insert a record in a child table that references a non-existent record in the parent table or when there are multiple child records that reference the same parent record. This exception can be handled by ensuring that the data being inserted or updated conforms to the one-to-many relationship between the tables