Googleapi: Error 400: Project in network field does not match project in subnetwork field

Terraform
1

I’m attempting to deploy a GKE cluster to Google cloud. Our network is governed via a shared VPC. The cluster i’m attempting to deploy is in a separate VPC. I’m receiving the error message above. I am using a self created module as a template.

resource "google_container_cluster" "main_cluster_template" {
  name = var.cluster_name
  description = var.cluster_description
  location = "europe-west2"
  remove_default_node_pool = true
  initial_node_count = 1
  project = var.project_name
  #ID of project
  network = var.network
  subnetwork = var.subnetwork_self_link
  release_channel {
    channel = var.release_channel
    # Set to the regular channel by Default.
  }
  ip_allocation_policy {
    cluster_secondary_range_name = var.pod_range_name
    services_secondary_range_name = var.service_range_name
  }
  private_cluster_config {
    enable_private_nodes = true
    enable_private_endpoint = false
    master_ipv4_cidr_block  = var.master_ip_range
    master_global_access_config {
      enabled = true
    }
  }
}

resource "google_container_node_pool" "main_cluster_node_pool" {
  name = var.node_pool_name
  cluster = google_container_cluster.main_cluster_template.name
  location = "europe-west2"
  node_count = var.node_count

  node_config {
    machine_type = var.machine_type
    labels = {
      created-by = "terraform"
    }
  }
  autoscaling {
    max_node_count = 4
    min_node_count = 1
  }
  upgrade_settings {
    max_surge = 1
    max_unavailable = 0
  }
}

The above is the code for the module.

module "test_gke_cluster" {
  project_name = "test-project-1"
  source = "../../../../modules/GKE/"
  cluster_name = "test-cluster"
  machine_type = "e2-medium"
  master_ip_range = "172.16.0.0/28"
  node_count = "1"
  node_pool_name = "test-pool"
  pod_range_name = "pod-range"
  service_range_name = "service-range"
  subnetwork_self_link = "projects/shared-vpc-network/global/subnetworks/test-terraform-subnet"
  network = "projects/shared-vpc-network/global/networks/shared-vpc"
}

This is the cluster which is using the module as a base.

The error messaged received is:

Error: googleapi: Error 400: Project in network field shared-vpc-network" does not match project in subnetwork field "test-project-1"., badRequest