Genesyscloud_securityuser 400 - Invalid Role Payload via Terraform

Dealing with a very strange bug here with genesyscloud_securityuser resource. Pushing HCL returns 400 Bad Request. Error is Invalid security user payload. JSON matches OpenAPI spec.

Context:
Terraform v1.9.8
Provider v1.65.0
Environment: Production

Snippet:
resource “genesyscloud_securityuser” “agent” {
name = “Test Agent”
email = “[email protected]”
roles = [“800”]
}

Roles exist. Apply fails. Any ideas?