Two or more tunnels lead to double route entries leading to a Terraform failed job

[maxkarami]

Here is the Terraform configuration:

module "vpn-prod-internal" {
  source  = "terraform-google-modules/vpn/google"
  version = "~> 1.2.0"

  project_id         = var.project_id
  network            = module.vpc-1.network_self_link
  region             = var.google_region
  gateway_name       = "vpn-gateway-1"
  tunnel_name_prefix = "vpn-gateway-1-tunnel"
  shared_secret      = "MySecret"
  tunnel_count       = 2
  peer_ips           = ["1.1.1.1", "2.2.2.2"]

  route_priority = 1000
  remote_subnet  = ["10.17.0.0/22", "10.16.80.0/24"]
}

Here is the output linest:
module.vpn-prod-internal.google_compute_route.route[0]: Creation complete after 16s [id=vpn-gateway-1-tunnel1-route1]
Error: Error creating Route: googleapi: Error 409: The resource 'projects/offis-sandbox-0334/global/routes/vpn-gateway-1-tunnel1-route1' already exists, alreadyExists
on .terraform/modules/vpn-prod-internal/main.tf line 24, in resource "google_compute_route" "route":
24: resource "google_compute_route" "route" {
Error: Error creating Route: googleapi: Error 409: The resource 'projects/offis-sandbox-0334/global/routes/vpn-gateway-1-tunnel2-route2' already exists, alreadyExists
on .terraform/modules/vpn-prod-internal/main.tf line 24, in resource "google_compute_route" "route":