Fixes #9402: Fix custom field population when creating a virtual chassis

docs/release-notes/version-3.2.md

@@ -18,6 +18,7 @@
 * [#9094](https://github.com/netbox-community/netbox/issues/9094) - Fix partial address search within Prefix and Aggregate filters
 * [#9358](https://github.com/netbox-community/netbox/issues/9358) - Annotate circuit count for providers list under ASN view
 * [#9387](https://github.com/netbox-community/netbox/issues/9387) - Ensure ActionsColumn `extra_buttons` are always displayed
+* [#9402](https://github.com/netbox-community/netbox/issues/9402) - Fix custom field population when creating a virtual chassis
 * [#9407](https://github.com/netbox-community/netbox/issues/9407) - Clean up display of prefixes values when exporting prefixes list
 * [#9420](https://github.com/netbox-community/netbox/issues/9420) - Fix custom script class inheritance
 * [#9425](https://github.com/netbox-community/netbox/issues/9425) - Fix bulk import for object and multi-object custom fields

netbox/dcim/forms/object_create.py

@@ -256,6 +256,8 @@ class VirtualChassisCreateForm(NetBoxModelForm):
         ]
 
     def clean(self):
+        super().clean()
+
         if self.cleaned_data['members'] and self.cleaned_data['initial_position'] is None:
             raise forms.ValidationError({
                 'initial_position': "A position must be specified for the first VC member."