Required custom field with default value

[Azmodeszer]

NetBox: v4.1.6
Sync: v1.7.0
vSphere: v8.0.3.00000

The sync is trying to create new VMs, but running into an error:

2024-11-12 06:03:57,949 - ERROR: NetBox returned: POST /api/virtualization/virtual-machines/ Bad Request
2024-11-12 06:03:57,949 - ERROR: NetBox returned body: {'__all__': ["Missing required custom field 'Icinga2_Monitoring_VM'."]}

And yes, this is a required field for VMs. However, it has a default value set, so I'm not sure why it's complaining about a missing field? Does the sync not work with default values?

I've set the field back to optional for now and the error disappears, but would of course prefer having it automatically set for VMs.