What am I doing wrong when working with the Django admin panel?

Question

Django

I need to add a database search to the Django admin panel and make some data appear in the preview
What am I doing wrong?

from django.contrib import admin
from .models import WorkingBase
from .models import Blacklist


admin.site.register(WorkingBase)
admin.site.register(Blacklist)

class WorkingBaseAdmin(admin.ModelAdmin):
  list_display=('title', 'price3')
  search_fields=('title')


admin.site.register(WorkingBase)

When adding this code, the site crashes:

class WorkingBaseAdmin(admin.ModelAdmin):
  list_display=('title', 'price3')
  search_fields=('title')


admin.site.register(WorkingBase)

Answer 1

I understand admin.py looks like this? (First block of code)

from django.contrib import admin
from .models import WorkingBase
from .models import Blacklist

admin.site.register(WorkingBase) # Первое подключение WorkingBase
admin.site.register(Blacklist)

class WorkingBaseAdmin(admin.ModelAdmin):
  list_display=('title', 'price3')
  search_fields=('title')


admin.site.register(WorkingBase) # Второе подключение WorkingBase