Setting Hugepages from the director

Hi,

When creating the overcloud from the undercloud, I would like to set the hugepages as described in the document below. But everytime I run the overcloud deploy, I get a failure saying that the compute_kernel_args parameter must be a string. It is already a string as shown in the document. Is this a documentation error or a bug or am I missing something?

https://access.redhat.com/documentation/en/red-hat-openstack-platform/10/single/network-functions-virtualization-configuration-guide/#ap-sriov-network-environment

from the deployment logs:
"overcloud", "resource_status": "CREATE_FAILED", "resource_status_reason": "Resource CREATE failed: resources.NodeUserData: resources.Compute.resources[0].Property error: resources.compute_kernel_args.properties.config: Value must be a string", "physical_resource_id": "af726733-824c-40b7-ae2c-829e7d7f47c7", "id": "4761e91d-e0cc-4733-a1b7-3c6c2376c0e3"}]

from my network-environment.yaml:
## Kernel arguments for Compute node
ComputeKernelArgs: "default_hugepagesz=1GB hugepagesz=1G hugepages=32 iommu=pt intel_iommu=on"

thanks