Attribute "null_when_not_found" is not working and apply fails even after setting it as true

[ksrijithjuniper]

Even after setting the attribute "null_when_not_found" in data apstra_datacenter_system as true, terraform apply fails with error Node not found.

Terraform provider version 0.74.0

Config :

learn the details of leaf1

data "apstra_datacenter_system" "ZAMN80121" {
blueprint_id = apstra_datacenter_blueprint.ZAM_DC1.id
name = "ZAMN80121"
null_when_not_found = true
}

Error message:

Error: Node not found
│
│ with data.apstra_datacenter_system.ZAMN80121,
│ on 02_blueprints.tf line 72, in data "apstra_datacenter_system" "ZAMN80121":
│ 72: data "apstra_datacenter_system" "ZAMN80121" {
│
│ Node with Name "ZAMN80121" not found in blueprint
│ "ab874390-8e50-4c9c-9d94-90726e8e1c18"