diff --git a/abonapp/migrations/0015_auto_20170410_1737.py b/abonapp/migrations/0015_auto_20170410_1737.py
new file mode 100644
index 0000000..66a2f79
--- /dev/null
+++ b/abonapp/migrations/0015_auto_20170410_1737.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9 on 2017-04-10 14:37
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('abonapp', '0014_auto_20170330_1452'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='abon',
+            name='opt82',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='abonapp.Opt82'),
+        ),
+    ]
diff --git a/abonapp/models.py b/abonapp/models.py
index 0ac7d09..1833abd 100644
--- a/abonapp/models.py
+++ b/abonapp/models.py
@@ -209,7 +209,7 @@ class Abon(UserProfile):
     street = models.ForeignKey(AbonStreet, on_delete=models.SET_NULL, null=True, blank=True)
     house = models.CharField(max_length=12, null=True, blank=True)
     extra_fields = models.ManyToManyField(ExtraFieldsModel, blank=True)
-    opt82 = models.ForeignKey(Opt82, null=True, blank=True)
+    opt82 = models.ForeignKey(Opt82, null=True, blank=True, on_delete=models.SET_NULL)
 
     _act_tar_cache = None
 
@@ -422,6 +422,8 @@ def abon_post_save(sender, instance, **kwargs):
 def abon_del_signal(sender, instance, **kwargs):
     try:
         ab = instance.build_agent_struct()
+        if ab is None:
+            return True
         # подключаемся к NAS'у
         tm = Transmitter()
         # нашли абонента, и удаляем его на NAS
diff --git a/abonapp/views.py b/abonapp/views.py
index 3a44b82..1dad601 100644
--- a/abonapp/views.py
+++ b/abonapp/views.py
@@ -317,11 +317,10 @@ def opt82(request, gid, uid):
             act = request.GET.get('act')
             if act is not None and act == 'release':
                 if abon.opt82 is not None:
-                    #models.Opt82.objects.get(pk=abon.opt82.pk).delete()
                     abon.opt82.delete()
+                    abon.opt82 = None
                     abon.save(update_fields=['opt82'])
 
-
     except models.Abon.DoesNotExist:
         messages.error(request, _('User does not exist'))
     except models.Opt82.DoesNotExist: