How to fix Error creating App Service Plan: WebHostingPlanNotFound in Terraform

resource "azurerm_service_plan" "example" {
  name                = "example-plan"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  os_type             = "Linux"
  sku_name            = "B1"
}

resource "azurerm_linux_web_app" "example" {
  name                = "example-app"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_service_plan.example.location
  service_plan_id     = azurerm_service_plan.example.id
}

data "azurerm_service_plan" "existing" {
  name                = "my-existing-plan"
  resource_group_name = "my-resource-group"
}

resource "azurerm_linux_web_app" "example" {
  name                = "example-app"
  resource_group_name = azurerm_resource_group.example.name
  service_plan_id     = data.azurerm_service_plan.existing.id

  depends_on = [data.azurerm_service_plan.existing]
}

# Both resources use the same resource group
resource "azurerm_service_plan" "example" {
  resource_group_name = azurerm_resource_group.example.name
  # ...
}

resource "azurerm_linux_web_app" "example" {
  resource_group_name = azurerm_resource_group.example.name
  service_plan_id     = azurerm_service_plan.example.id
  # ...
}

terraform {
  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "~> 3.0"
    }
  }
}

provider "azurerm" {
  features {}
}

terraform import azurerm_service_plan.example /subscriptions/{subscription-id}/resourceGroups/{resource-group}/providers/Microsoft.Web/serverfarms/{plan-name}