How to fix Error: Duplicate import for ID - The same resource cannot be imported twice in Terraform

Search your configuration for import blocks using the same ID:

grep -r "id = " . --include="*.tf" | grep -E "import|id"

Or use Terraform's built-in syntax validation:

terraform validate

This will show you all import blocks and highlight which ones share the same ID.

Update your import blocks to use unique IDs. Instead of:

import {
  id = "default"
  to = module.us-east-1.aws_ebs_encryption_by_default.default
}

import {
  id = "default"
  to = module.us-west-2.aws_ebs_encryption_by_default.default
}

Change to:

import {
  id = "default"
  to = module.us-east-1.aws_ebs_encryption_by_default.default
}

import {
  id = "default"
  to = module.us-west-2.aws_ebs_encryption_by_default.default
}

The key difference is in the to address - even if the ID is "default", Terraform should distinguish them by their full resource address in different modules.

This issue was reported in Terraform's GitHub issue #33390 as a false-positive validation bug. Check your Terraform version:

terraform version

If you're using an older version, upgrade to the latest:

# macOS
brew upgrade terraform

# Linux
wget https://releases.hashicorp.com/terraform/<VERSION>/terraform_<VERSION>_linux_amd64.zip
unzip terraform_<VERSION>_linux_amd64.zip
sudo mv terraform /usr/local/bin/

Newer versions have fixes for this false-positive detection.

If using child modules, ensure each import uses the complete resource address path:

import {
  id = "us-east-1:default"
  to = module.us-east-1.aws_ebs_encryption_by_default.default
}

import {
  id = "us-west-2:default"
  to = module.us-west-2.aws_ebs_encryption_by_default.default
}

This makes the ID unique while keeping it semantically clear which region/module it belongs to.

If you have multiple imports of the same resource type, consider importing them one at a time:

terraform import module.us-east-1.aws_ebs_encryption_by_default.default default
terraform import module.us-west-2.aws_ebs_encryption_by_default.default default

This avoids having multiple import blocks with the same ID in your configuration file. After importing, remove the import blocks from your _auto_import.tf file.

Once you've updated the import blocks or IDs, validate your configuration:

terraform init
terraform validate
terraform plan

The init should now succeed without duplicate ID errors, and plan will show you what Terraform intends to import.