old_contents: from django.conf import settings
  from django.contrib import admin
  
  from geotrek.feedback import models as feedback_models
  
  if 'modeltranslation' in settings.INSTALLED_APPS:
      from modeltranslation.admin import TabbedTranslationAdmin
  else:
      from django.contrib.admin import ModelAdmin as TabbedTranslationAdmin
  
  
  class WorkflowManagerAdmin(admin.ModelAdmin):
  
      def has_add_permission(self, request):
          # There can be only one manager
          perms = super().has_add_permission(request)
          if perms and feedback_models.WorkflowManager.objects.exists():
              perms = False
          return perms
  
  
  admin.site.register(feedback_models.ReportCategory, TabbedTranslationAdmin)
  admin.site.register(feedback_models.ReportStatus)
  admin.site.register(feedback_models.ReportActivity, TabbedTranslationAdmin)
  admin.site.register(feedback_models.ReportProblemMagnitude, TabbedTranslationAdmin)
  
new_contents: from django.conf import settings
  from django.contrib import admin
  
  from geotrek.feedback import models as feedback_models
  
  if 'modeltranslation' in settings.INSTALLED_APPS:
      from modeltranslation.admin import TabbedTranslationAdmin
  else:
      from django.contrib.admin import ModelAdmin as TabbedTranslationAdmin
  
  
  class WorkflowManagerAdmin(admin.ModelAdmin):
  
      def has_add_permission(self, request):
          # There can be only one manager
          perms = super().has_add_permission(request)
          if perms and feedback_models.WorkflowManager.objects.exists():
              perms = False
          return perms
  
  admin.site.register(feedback_models.WorkflowManager, WorkflowManagerAdmin)
  admin.site.register(feedback_models.ReportCategory, TabbedTranslationAdmin)
  admin.site.register(feedback_models.ReportStatus)
  admin.site.register(feedback_models.ReportActivity, TabbedTranslationAdmin)
  admin.site.register(feedback_models.ReportProblemMagnitude, TabbedTranslationAdmin)
  
subject: Fix deleted line during merge