Error while running Terraform Import Command to import Azure Key Vault

I have a key vault in my Azure subscription and now i want to put this KV in my Terraform State File as Terraform is throwing this error during Apply :

 │ Error: A resource with the ID "/subscriptions/xxxxx1-41b1-4519-xxxxxx-8c25546c0829/resourceGroups/rg-identity-prd-cus-001/providers/Microsoft.KeyVault/vaults/kv-identity-prd-cus-001" already exists - to be managed via Terraform this resource needs to be imported into the State. Please see the resource documentation for "azurerm_key_vault" for more information.
    │ 
    │   with module.identity_subscription[0].module.key_vault[0].azurerm_key_vault.key_vault,
    │   on ../modules/key_vault/key_vault.tf line 58, in resource "azurerm_key_vault" "key_vault":
    │   58: resource "azurerm_key_vault" "key_vault" {

So i have created a module and a module block as shown below :

resource "azurerm_key_vault" "key_vault" {
      # required
      name                            = "${var.abbreviation}-${var.workload}-${var.environment}-${var.location_short_name}-${var.instance_number}"
      location                        = var.location
      resource_group_name             = var.resource_group_name
      sku_name                        = var.sku_name
      tenant_id                       = data.azurerm_client_config.current.tenant_id # current tenant_id from azurerm provider
      # optional
      enabled_for_deployment          = var.enabled_for_deployment
      enabled_for_disk_encryption     = var.enabled_for_disk_encryption
      enabled_for_template_deployment = var.enabled_for_template_deployment
      enable_rbac_authorization       = var.enable_rbac_authorization
      purge_protection_enabled        = var.purge_protection_enabled
      soft_delete_retention_days      = var.soft_delete_retention_days
      tags                            = var.tags
    
      network_acls {
        bypass         = "AzureServices"
        default_action = "Deny"
      }
    
      #Optional if Azure policies are forced to use RBAC
      access_policy {
        tenant_id = data.azurerm_client_config.current.tenant_id
        object_id = data.azurerm_client_config.current.object_id 
    
        key_permissions = [
          "Get","Create","List",
        ]
    
        secret_permissions = [
          "Get","Set","List",
        ]
    
      }
    
      lifecycle {
        ignore_changes = [
          tags["CreatedOn"],
          network_acls
    
        ]
      }
    }

The module is in it's own modules folder with other child modules I am calling the child module in my root module as shown below :

   module "key_vault" {
      count               = var.enable_keyvault == true ? 1 : 0
      source              = "../../../modules/key_vault"
      environment         = var.environment
      instance_number     = var.instance_number
      location_short_name = var.location_short_name                        
      workload            = local.application_names.workload_type
      location            = var.location              
      tags                = local.tags
      resource_group_name = module.resource_group.rg_name_subs
      sku_name            = var.kv_sku_name
    }

Now when i run the import command as shown below i get error :

 terraform import module.key_vault.azurerm_key_vault.key_vault  "/subscriptions/xxxx-41xx-4xxx9-9658-8c25546c0829/resourceGroups/rg-identity-prd-cus-001/providers/Microsoft.KeyVault/vaults/kv-identity-prd-cus-001" 

Import Error Message :

Error: Import to non-existent module
│
│ module.key_vault is not defined in the configuration. Please add configuration  
│ for this module before importing into it.

My Folder Structure is shown in the attachment

From what you’ve shared, the error seems to occur because Terraform cannot locate the key_vault module during the import process. The initial error shows that the key_vault module is nested within identity_subscription module, and Terraform requires the full path to the resource being imported.

To fix it, use the full path in the import command:

terraform import 'module.identity_subscription[0].module.key_vault[0].azurerm_key_vault.key_vault' "/subscriptions/xxxxx1-41b1-4519-xxxxxx-8c25546c0829/resourceGroups/rg-identity-prd-cus-001/providers/Microsoft.KeyVault/vaults/kv-identity-prd-cus-001"

This path matches the module hierarchy Terraform expects based on your configuration. Also make sure to:

1. Verify that the identity_subscription module is properly configured in your root module.
2. Confirm that identity_subscription calls the key_vault module correctly.

Finally, run terraform init and terraform plan to ensure the resource is successfully imported into the state and matches the configuration.

Hope it helps.