Do not save empty form_config entries

src/servala/core/forms.py

@@ -101,6 +101,12 @@ class ControlPlaneAdminForm(forms.ModelForm):
         return super().save(*args, **kwargs)
 
 
+def fields_empty(fields):
+    if not fields:
+        return True
+    return all(not field.get("controlplane_field_mapping") for field in fields)
+
+
 class ServiceDefinitionAdminForm(forms.ModelForm):
     api_group = forms.CharField(
         required=False,
@@ -161,6 +167,16 @@ class ServiceDefinitionAdminForm(forms.ModelForm):
                 cleaned_data["api_definition"] = api_def
 
         form_config = cleaned_data.get("form_config")
+
+        # Convert empty form_config to None (no custom form)
+        if form_config:
+            if not form_config.get("fieldsets") or all(
+                fields_empty(fieldset.get("fields"))
+                for fieldset in form_config.get("fieldsets")
+            ):
+                form_config = None
+                cleaned_data["form_config"] = None
+
         if form_config:
             form_config = self._normalize_form_config_types(form_config)
             cleaned_data["form_config"] = form_config