Terraform `genesyscloud_routing_queue` skill assignment failing with 400

Trying to provision a Genesys Cloud queue with specific skills using the CX as Code Terraform provider. My genesyscloud_routing_queue resource defines skills as a list of IDs, but terraform apply throws a 400 Bad Request saying the skill ID is invalid. The IDs are definitely correct since I pulled them from the API. Here’s the block:

resource "genesyscloud_routing_queue" "support" {
 name = "Tech Support"
 skills = ["abc-123-def"]
}

Any idea why the provider rejects valid skill IDs?