Hibernate Mapping Exception : Repeated column in mapping for entity

Question

There is a mapping exception for a particular entity. Cant figure out from where the problem is arising. I checked all the mappings 3 times from start to end. Still i am get

Answer 1

I think you have mapped Employee to Email using oneToMany relation. If yes its nothing wrong but you have to make sure you can insert and update only in one direction

should be mapped with insert="false" update="false" in Employee