Hi all, i try to make my 1st subscription but i'm blocked because i try to update a child element. I want to update student meetings in this query structure

query allEvents($id: ID) {
        allEvents(filter: {id: $id}){
            id
            courseName
            academicYear
            students{
                id
                name
                email
                implementations(filter: {events_some: {id: $id}}){
                    id
                    project{
                        id
                        name
                    }
                }
                meetings(filter: {event: {id: $id}}) {
                    id
                    author{
                        id
                        name
                    }
                }
            }
       }
  }