Network's profile field reports diff even when it's not changing

[AshwinGururagh]

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Terraform Version & Provider Version(s)

Terraform v1.12.1
on darwin_arm64

• provider registry.terraform.io/hashicorp/google vX.X.X
• provider registry.terraform.io/hashicorp/google-beta vX.X.X

Affected Resource(s)

google_compute_network

Terraform Configuration

resource "google_compute_network" "vpc_network" {
  name                    = "tf-test-net-1"
  auto_create_subnetworks = false
  network_profile = "projects/myproj/global/europe-west1-b-vpc-roce"
}

Debug Output

No response

Expected Behavior

With the above configuration, running terraform apply without any changes once the resource has been created the first time should be a no-op.

Actual Behavior

With the above configuration, running terraform apply without any changes after the resource has been created the first time, leads to forced replacement of the Network resource.

Terraform will perform the following actions:

  # google_compute_network.vpc_network must be replaced
-/+ resource "google_compute_network" "vpc_network" {
      ~ bgp_always_compare_med                    = false -> (known after apply)
      ~ bgp_best_path_selection_mode              = "LEGACY" -> (known after apply)
      + bgp_inter_region_cost                     = (known after apply)
      - enable_ula_internal_ipv6                  = false -> null
      + gateway_ipv4                              = (known after apply)
      ~ id                                        = "projects/myproj/global/networks/tf-test-net-1" -> (known after apply)
      + internal_ipv6_range                       = (known after apply)
      ~ mtu                                       = 0 -> (known after apply)
        name                                      = "tf-test-net-1"
      ~ network_id                                = "12345" -> (known after apply)
      ~ network_profile                           = "https://www.googleapis.com/compute/v1/projects/myproj/global/networkProfiles/us-west3-c-vpc-roce" -> "projects/myproj/global/networkProfiles/us-west3-c-vpc-roce" # forces replacement
      ~ numeric_id                                = "12345" -> (known after apply)
      ~ routing_mode                              = "REGIONAL" -> (known after apply)
      ~ self_link                                 = "https://www.googleapis.com/compute/v1/projects/myproj/global/networks/tf-test-net-1" -> (known after apply)
        # (5 unchanged attributes hidden)
    }

Plan: 1 to add, 0 to change, 1 to destroy.

Steps to reproduce

1. terraform apply

Important Factoids

No response

References

terraform-google-modules/terraform-google-network#622

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