diff --git a/awx/main/migrations/0139_isolated_removal.py b/awx/main/migrations/0139_isolated_removal.py
index 0db16b6348..024fd23ccb 100644
--- a/awx/main/migrations/0139_isolated_removal.py
+++ b/awx/main/migrations/0139_isolated_removal.py
@@ -11,8 +11,11 @@ def remove_iso_instances(apps, schema_editor):
 
 def remove_iso_groups(apps, schema_editor):
     InstanceGroup = apps.get_model('main', 'InstanceGroup')
+    UnifiedJob = apps.get_model('main', 'UnifiedJob')
     with transaction.atomic():
-        InstanceGroup.objects.filter(controller__isnull=False).delete()
+        for ig in InstanceGroup.objects.filter(controller__isnull=False):
+            UnifiedJob.objects.filter(instance_group=ig).update(instance_group=None)
+            ig.delete()
 
 
 class Migration(migrations.Migration):