Importing existing accounts issue - Error: extra_settings.0.value

[jmd-au]

When importing existing Cloud Formation accounts in TF, and the resource that it's being associated with in the state doesn't have any definitions under extra_settings the import fails.

Full error code:

Error: extra_settings.0.value: '' expected type 'string', got unconvertible type 'float64', value: '0'

Code being used to import resources

resource "conformity_aws_account" "test_master" {
  name        = "${var.customer_name}-${var.account_id}"
  environment = "master"
  role_arn    = module.conformity.conformity_integration_arn
  external_id = module.conformity.external_id
  tags = [
    "${var.customer_name}"
  ]
}

# # import statement for existing account
import {
  to = conformity_aws_account.test_master
  id = "[redacted]"
}

I have also attempted importing to resources that have no variables or module references - same thing occurs.

I'm also bound by using the import {} block within terraform, as we run our code through CI and don't have direct access to the remote state from our machines.