fix

core/apps/orders/signals/party.py

@@ -6,7 +6,7 @@ from core.apps.orders.models import Party
 
 @receiver(post_save, sender=Party)
 def set_party_number(sender, instance, created, **kwargs):
-    if created:
+    if created and not instance.number:
         last_party = Party.objects.order_by('number').last()
         instance.number = (last_party.number + 1) if last_party else 1
         instance.save(update_fields=["number"])