diff --git a/core/migrations/0057_alter_assetgroup_account_and_more.py b/core/migrations/0057_alter_assetgroup_account_and_more.py
new file mode 100644
index 0000000..b0afd61
--- /dev/null
+++ b/core/migrations/0057_alter_assetgroup_account_and_more.py
@@ -0,0 +1,24 @@
+# Generated by Django 4.1.6 on 2023-02-11 18:17
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0056_alter_assetrestriction_pairs_parsed'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='assetgroup',
+            name='account',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='core.account'),
+        ),
+        migrations.AlterField(
+            model_name='assetrestriction',
+            name='pairs_parsed',
+            field=models.JSONField(blank=True, default=list, null=True),
+        ),
+    ]
diff --git a/core/models.py b/core/models.py
index dbff30f..09a50dc 100644
--- a/core/models.py
+++ b/core/models.py
@@ -412,7 +412,7 @@ class AssetGroup(models.Model):
     description = models.TextField(null=True, blank=True)
 
     # Account for checking pairs on children if specified
-    account = models.ForeignKey(Account, on_delete=models.CASCADE)
+    account = models.ForeignKey(Account, on_delete=models.PROTECT, null=True, blank=True)
 
     # Dict like {"RUB": True, "USD": False}
     allowed = models.JSONField(null=True, blank=True, default=dict)