LiveObjectProxy object not callable

I keep getting ‘LiveObjectProxy’ object is not callable erro when trying your code. anyway to fix this?

ver_iterm = app_tables.events.get(Event_Name= self.item['Event Name'])
ver_person = app_tables.students.get(Email=user['email'])
ver_person['Events_Atending'] = [r for r in ver_person['Events_Atending'] if r != ver_iterm]

Are you using accelerated tables?