문제문제해석해결방안1. Bag을 Set으로 바꿔서 한번에 쿼리를 진행한다.2. Join Fetch를 한번만 진행한다.문제@Query("select ac from Accommodation ac join fetch ac.roomList r" + "join fetch r.roomProductList rp where ac.id = :accommodationId" + "AND rp.startDate = :startDate")c.a.global.error.GlobalExceptionHandler : org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags: [com.aroom.domain.room.model.Ro..