Azure Function App with Premium plan with Regional vNet integration

Terraform
1

Hi,

I’m trying to create Function App with Premium plan and integrating function app with regional vNet.

resource “azurerm_app_service_plan” “service_plan” {
name = “functionapp-service-plan”
resource_group_name = var.resource_group_name
location = var.location
kind = “Linux”
reserved = true

sku {
    tier = "PremiumV2"
    size = "P1v2"
}

}

resource “azurerm_function_app” “function_app” {
name = “functionapp-{var.prefix}-{var.environment}”
location = var.location
resource_group_name = var.resource_group_name
app_service_plan_id = azurerm_app_service_plan.service_plan.id
storage_account_name = azurerm_storage_account.storage.name
storage_account_access_key = azurerm_storage_account.storage.primary_access_key
os_type = “linux”
version = “~2”

app_settings = {
    https_only = true
    FUNCTIONS_WORKER_RUNTIME = "java"
    WEBSITE_NODE_DEFAULT_VERSION = "~10"
    FUNCTION_APP_EDIT_MODE = "readonly"
    
}

}

resource “azurerm_app_service_virtual_network_swift_connection” “function_app_subnet_conn_adf” {
app_service_id = azurerm_function_app.function_app.id
subnet_id = data.azurerm_subnet.mq_subnet.id
}

Received below error while applying above script, any help please. not much clear error
Error: Error creating/updating App Service VNet association between “” (Resource Group “”) and Virtual Network “”:
web.AppsClient#CreateOrUpdateSwiftVirtualNetworkConnection: Failure sending request: StatusCode=409 – Original Error: autorest/azure: Service returned an error. Status=