mod: в функциях корректно установлены значения по умолчанию и добавлены внутренние валидаторы наличия полей в моделях.

lpon_site/frontend/admin.py

@@ -10,7 +10,7 @@ from .models import (
     TbImage, TbArticle, TbArtist, TbItem, TbLabel, TbSeller,
     TbOffer, TbSource, TbOfferHistory, TbMusicStyle
 )
-from .utils import validate_entity_for_admin_form, generate_admin_save_message
+from .utils_validators import validate_entity_for_admin_form, generate_admin_save_message
 
 
 # ============================================================================
@@ -583,6 +583,7 @@ class LabelAdmin(RequestInFormMixin, admin.ModelAdmin):
             is_new=not change,  # Django: change=False для новых, True для существующих
             related_article=obj.k_label_to_article,
             obj_field_name='s_label',
+            article_title_field='s_article_title',
         )
 
     fieldsets = (

lpon_site/frontend/models.py

@@ -241,7 +241,8 @@ from django.db import models
 from django.db.models import F
 from filer.fields.image import FilerImageField
 from filer.fields.file import FilerFileField
-from frontend.utils import make_slug, validate_and_raise_for_duplicates, update_synonyms_in_metadata, create_or_get_related_article
+from frontend.utils import make_slug, update_synonyms_in_metadata, create_or_get_related_article
+from frontend.utils_validators import validate_and_raise_for_duplicates
 import datetime
 import logging