Terraform `genesyscloud_auth_division` 409 Conflict on apply

Running terraform apply keeps failing with a 409 Conflict when creating the genesyscloud_auth_division resource. The docs suggest this happens if the division already exists, but I’m sure it’s not. My config is minimal:

resource "genesyscloud_auth_division" "main" {
 name = "Main Division"
 description = "Default division"
}

The error payload shows "code": "duplicate_key". Is there a hidden default division I need to import first, or is this a provider bug with the initial state?