尝试在apim中的操作上部署策略时，我无法实施策略。

错误日志

Error: creating or updating API Policy (Resource Group "rg-opendata-dev" / API Management Service "apimopendata-dev" / API "apim-opendata-dev"): apimanagement.APIPolicyClient#CreateOrUpdate: Failure responding to request: StatusCode=400 -- Original Error: autorest/azure: Service returned an error. Status=400 Code="ValidationError" Message="Entity with specified identifier not found"
│ 
│   with azurerm_api_management_api_policy.apipolicy,
│   on main.tf line 78, in resource "azurerm_api_management_api_policy" "apipolicy":
│   78: resource "azurerm_api_management_api_policy" "apipolicy" {
│ 
╵

我不明白这一点，因为我很确定我写的变量是正确的，或者我给变量起了错误的名字？
您是否也认为使用如下所示的xml代码添加策略是部署策略的正确方法？

Part of the main.tf file

resource "azurerm_api_management_api" "api" {
    name = "apim-opendata-${var.env}"
    resource_group_name = data.azurerm_resource_group.rg.name
    api_management_name = azurerm_api_management.apim.name
    revision = "1"
    display_name = "${var.display_name}"
    service_url = "${var.service_url}"
    protocols = ["https"]
}

resource "azurerm_api_management_api_operation" "apioperation" {
  operation_id = "get-data"
  api_name = azurerm_api_management_api.api.name
  api_management_name = azurerm_api_management.apim.name
  resource_group_name = data.azurerm_resource_group.rg.name
  display_name = "Get Data"
  method = "GET"
  url_template = "/"
  description = "Get data inside of the container"

  response {
    status_code = 200
  }
}

resource "azurerm_api_management_api_policy" "apipolicy" {
    api_name = azurerm_api_management_api.api.name
    api_management_name = azurerm_api_management.apim.name
    resource_group_name = data.azurerm_resource_group.rg.name

    xml_content = <<XML
<policies>
    <inbound>
        <set-variable name="ContainerName" value="@(context.Request.Headers.GetValueOrDefault("Container"))" />
        <set-variable name="BlobName" value="@(context.Request.Headers.GetValueOrDefault("Blob"))" />
        <base />
        <set-header name="Blob" exists-action="delete" />
        <set-header name="Container" exists-action="delete" />
        <set-header name="x-ms-version" exists-action="override">
            <value>@{string version = "2017-11-09"; return version;}</value>
        </set-header>
        <set-backend-service base-url="@{
string containerName = context.Variables.GetValueOrDefault<string>("ContainerName");
string blobName = context.Variables.GetValueOrDefault<string>("BlobName");
return String.Format("https://${var.storage_account_name}.blob.core.windows.net/{0}/{1}", containerName, blobName);
}" />
        <authentication-managed-identity resource="https://storage.azure.com/" />
    </inbound>
    <backend>
        <base />
    </backend>
    <outbound>
        <base />
    </outbound>
    <on-error>
        <base />
    </on-error>
</policies>
XML  
}