diff --git a/awx/main/migrations/0139_isolated_removal.py b/awx/main/migrations/0139_isolated_removal.py
index 0db16b6348..793b8a10d6 100644
--- a/awx/main/migrations/0139_isolated_removal.py
+++ b/awx/main/migrations/0139_isolated_removal.py
@@ -9,12 +9,6 @@ def remove_iso_instances(apps, schema_editor):
         Instance.objects.filter(rampart_groups__controller__isnull=False).delete()
 
 
-def remove_iso_groups(apps, schema_editor):
-    InstanceGroup = apps.get_model('main', 'InstanceGroup')
-    with transaction.atomic():
-        InstanceGroup.objects.filter(controller__isnull=False).delete()
-
-
 class Migration(migrations.Migration):
     atomic = False
 
@@ -24,7 +18,6 @@ class Migration(migrations.Migration):
 
     operations = [
         migrations.RunPython(remove_iso_instances),
-        migrations.RunPython(remove_iso_groups),
         migrations.RemoveField(
             model_name='instance',
             name='last_isolated_check',