Resolving "Unsupported Attributes" Errors in Terraform Configurations – HashiCorp Help Center

Introduction

Problem

Users may encounter errors such as "unsupported attribute" while working with Terraform configurations, particularly when using providers like AzureRM or AWS. These errors typically occur during plan or apply operations and prevent successful deployment of infrastructure.

Cause

The error is usually caused by one of the following:

The Terraform configuration includes attributes that are not supported in the version of the provider currently in use.
The resource state file may have been created or modified using a different provider version, leading to mismatches between the configuration and the state.
A recent upgrade or downgrade of the provider version without updating the configuration accordingly.

Overview of possible solutions (if applicable)

Solutions:

To resolve this issue, follow these steps:

Verify Provider Compatibility:
- Check the documentation for the specific provider (e.g., AzureRM or AWS) to confirm whether the attribute is supported in the version you are using.
- If the attribute is not supported in your current version, either remove it or upgrade the provider to a version that supports it.
Update or Recreate the Resource:
- If the state file contains unsupported attributes, you may need to:
  - Remove the resource from the state file using:
```
terraform state rm <resource_name>
```
  - Re-import the resource using:
```
terraform import <resource_name> <resource_id>
```
  - Or recreate the resource with the correct attributes and supported provider version.

Use Specific Provider Version:

Lock the provider version in your Terraform configuration to ensure consistency:

terraform {
  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "3.90.0" # Example version
    }
  }
}

Outcome

After applying the above steps:

The configuration will align with the supported attributes of the provider version.
Terraform operations (plan/apply) will execute successfully.
The infrastructure state will be consistent and free from attribute-related errors.