old_contents: from django.contrib import admin
  from manager.models import Package, Build
  
  
  class PackageAdmin(admin.ModelAdmin):
      list_display = ('name', 'source')
  
  
  admin.site.register(Package, PackageAdmin)
  
  
  class BuildAdmin(admin.ModelAdmin):
      list_display = ('package', 'version', 'date')
  
  
  admin.site.register(Build, BuildAdmin)
  
new_contents: from django.contrib import admin
  from manager.models import Package, Build
  
  
  class PackageAdmin(admin.ModelAdmin):
      list_display = ('id', 'name', 'source')
  
  
  admin.site.register(Package, PackageAdmin)
  
  
  class BuildAdmin(admin.ModelAdmin):
      list_display = ('id', 'package', 'version', 'date')
  
  
  admin.site.register(Build, BuildAdmin)
  
subject: Update admin page