old_contents: from django.contrib import admin
  from .models import Song,Album
  # Register your models here.
  admin.site.register(Song)
  admin.site.register(ALbum)
  
new_contents: from django.contrib import admin
  from .models import Song,Album
  # Register your models here.
  admin.site.register(Song)
  admin.site.register(Album)
  
subject: fix admin