old_contents: from django.contrib import admin
  from django.forms import model_to_dict
  from django.utils.timezone import now
  
  from main.models import Lan, Event
  
  
  class EventInline(admin.TabularInline):
      model = Event
      show_change_link = True
  
      fields = ('name', 'url', 'start', 'end')
  
  
  @admin.register(Lan)
  class LanAdmin(admin.ModelAdmin):
      list_display = ('name', 'start', 'seats_count', 'is_open')
  
      fieldsets = (
          ('Tider', {
              'fields': (('start', 'end'), 'open', 'show_calendar')
          }),
          ('Pladser', {
              'fields': ('seats',)
          }),
          ('Tekst', {
              'fields': ('name', 'schedule', 'blurb')
          }),
          ('Betaling', {
              'fields': ('paytypes', 'price', 'payphone')
          }),
          ('Madbestilling', {
              'fields': ('food_open', 'food_phone')
          }),
      )
  
      inlines = [
          EventInline
      ]
  
      def get_changeform_initial_data(self, request):
          try:
              prev_lan = Lan.objects.filter(start__lt=now()).order_by("-start")[0]
              return model_to_dict(prev_lan, ['blurb', 'seats', 'schedule'])
          except (Lan.DoesNotExist, AttributeError, IndexError):
              return {}
new_contents: from django.contrib import admin
  from django.forms import model_to_dict
  from django.utils.timezone import now
  
  from main.models import Lan, Event
  
  
  class EventInline(admin.TabularInline):
      model = Event
      show_change_link = True
  
      fields = ('name', 'url', 'start', 'end')
  
  
  @admin.register(Lan)
  class LanAdmin(admin.ModelAdmin):
      list_display = ('name', 'start', 'seats_count', 'is_open')
  
      fieldsets = (
          ('Tider', {
              'fields': (('start', 'end'), 'open', 'show_calendar')
          }),
          ('Pladser', {
              'fields': ('seats',)
          }),
          ('Tekst', {
              'fields': ('name', 'blurb')
          }),
          ('Betaling', {
              'fields': ('paytypes', 'price', 'payphone')
          }),
          ('Madbestilling', {
              'fields': ('food_open', 'food_phone')
          }),
      )
  
      inlines = [
          EventInline
      ]
  
      def get_changeform_initial_data(self, request):
          try:
              prev_lan = Lan.objects.filter(start__lt=now()).order_by("-start")[0]
              return model_to_dict(prev_lan, ['blurb', 'seats', 'schedule'])
          except (Lan.DoesNotExist, AttributeError, IndexError):
              return {}
subject: Remove schedule from admin too