Wrong column type - Found: serial, expected: int8
===

I'm writing my first Grails app and I've reversed my existing Postgresql schema using the Grails Application Generator.  (GRAG)  When I run the app, I get the error:

> Invocation of init method failed; nested exception is
> org.hibernate.HibernateException:  Wrong column type in
> public.event_staff for column event_staff_id. Found: serial, expected:
> int8

I'm guessing this is due to "serial" not being a *real* type in Postgresql and more of an alias for an auto incrementing integer value that is tied to a sequence.  I imagine there is a clean way to work around this issue, but having no experience with Hibernate I'm not sure the best way to move forward.

Here's the class in question: 

   

     class EventStaff {
            static mapping = {
                 table 'event_staff'
                 // version is set to false, because this 
                 // isn't available by default for legacy databases
                 version false
                 id generator:'identity', column:'event_staff_id', 
    name: 'eventStaffId'
                 staffMemberIdStaffMember column:'staff_member_id'
                 gameIdGame column:'game_id'
            }
            Long eventStaffId
            Boolean shouldNotify
            Date created
            Date modified
            // Relation
            StaffMember staffMemberIdStaffMember
            // Relation
            Game gameIdGame
        
            static constraints = {
                eventStaffId()
                shouldNotify()
                created()
                modified()
                staffMemberIdStaffMember()
                gameIdGame()
            }
            String toString() {
                return "${eventStaffId}" 
            }
        }