policies/api: fix target returning pbm_uuid instead of proper primary key of the object

passbook/flows/migrations/0012_auto_20200908_1542.py

@@ -0,0 +1,26 @@
+# Generated by Django 3.1.1 on 2020-09-08 15:42
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import passbook.lib.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("passbook_flows", "0011_flow_title"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="flowstagebinding",
+            name="stage",
+            field=passbook.lib.models.InheritanceForeignKey(
+                on_delete=django.db.models.deletion.CASCADE, to="passbook_flows.stage"
+            ),
+        ),
+        migrations.AlterField(
+            model_name="stage", name="name", field=models.TextField(unique=True),
+        ),
+    ]