Terraform fails to create a namespace if its configuration is empty (no groups)

[e-gautier]

terraform -v
v1.5.0

actual behavior

When attempting to create a namespace (for instance: )

resource "mimirtool_ruler_namespace" "my_namespace" {
  namespace                   = "my_namespace"
  config_yaml                 = file("my_namespace.yaml")
  strict_recording_rule_check = true
}

where my_namespace.yaml contains the following:

---
namespace: my_namespace
groups: []

Terraform succeeds to plan but fails to apply and returns no namespace definition found.

Expected Behavior

Terraform should fail to plan or proceed to create an empty namespace on apply.