Terraform vault policy import error

I have a bunch of existing Vault policies with the following naming conventions

  • org1.bu1
  • org1.bu2
  • org1.buN

I would like to manage these policies using terraform, however when I try to import these vault policies using terraform

terraform import vault_policy.org1.bu1 org1.bu1

I get the following error

Error: Invalid address
│   on <import-address> line 1:
│    1: vault_policy.org1.bu1
│ Resource instance key must be given in square brackets.

Please show the Terraform resource block you are using, it will be easier to explain with this context.