Data migration to remove the isolated instances from the database

awx/main/migrations/0141_remove_isolated_instances.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.16 on 2021-05-11 19:38
+
+from django.db import migrations
+
+
+def forwards(apps, schema_editor):
+    Instance = apps.get_model('main', 'Instance')
+    Instance.objects.filter(version__startswith='ansible-runner-').delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0140_rename'),
+    ]
+
+    operations = [
+        migrations.RunPython(forwards),
+    ]