Terragrunt keeps adding latest version of of provider from opentofu registry and ignore terraform version constraint

Describe the bug

I have my repository set up to support multiple environments using multiple folder and have a single terragrunt.hcl file at the root level. In that file I define the provider constraint to be ~>5.28 using the required_provider block from terraform.

generate "provider" {
  path      = "provider_override.tf"
  if_exists = "overwrite_terragrunt"

  contents  = <<EOF
    terraform {
      required_providers {
        google = {
          source  = "hashicorp/google"
          version = "~>5.28"
        }
      }
    }
    provider "google" {
      project = "${local.project_id}"
      region  = "${local.region_location}"
    }
  EOF
}

Upon running plan command locally, I notice the .terraform.lock.hcl keep getting updates with with the latest version of the provider from opentofu. I got to learn that terragrunt use opentofu as default if it is available. However, I don't have opentofu installed on my machine. I also set the TERRAGRUNT_TFPATH to point to terraform, but no luck

Here is an example of my lock file code

Expected behavior

Expect the lock file to only contains provider from terraform
OR the opentofu version must follow the terraform constraints

Nice to haves

[x] Terminal output from plan command


terragrunt run-all plan --terragrunt-working-dir infrastructures/eu/acc/org-common/cloud-run-service/automated-test-controller
eu-north
Module:                  /Users/nguyenvo/Desktop/Randstad/DigitalGlue-squad3/transcoder-shared-infrastructures/infrastructures/eu/acc/org-common/cloud-run-service/automated-test-controller
External dependency:     /Users/nguyenvo/Desktop/Randstad/DigitalGlue-squad3/transcoder-shared-infrastructures/infrastructures/eu/acc/org-common/service-accounts
Should Terragrunt apply the external dependency? (y/n) n
INFO[0002] The stack at infrastructures/eu/acc/org-common/cloud-run-service/automated-test-controller will be processed in the following order for command plan:
Group 1

Module /Users/nguyenvo/Desktop/Randstad/DigitalGlue-squad3/transcoder-shared-infrastructures/infrastructures/eu/acc/org-common/cloud-run-service/automated-test-controller

Initializing the backend...

Initializing provider plugins...

Reusing previous version of registry.opentofu.org/hashicorp/google from the dependency lock file
Reusing previous version of registry.opentofu.org/hashicorp/google-beta from the dependency lock file
Reusing previous version of hashicorp/google from the dependency lock file
Reusing previous version of hashicorp/google-beta from the dependency lock file
Using previously-installed registry.opentofu.org/hashicorp/google v6.4.0
Using previously-installed registry.opentofu.org/hashicorp/google-beta v6.4.0
Using previously-installed hashicorp/google v5.44.1
Using previously-installed hashicorp/google-beta v6.4.0

Terraform has been successfully initialized!



## Versions

- Terragrunt version: 0.55.3
- Terraform version:
- Environment details (Ubuntu 20.04, Windows 10, etc.): Mac Montery v12.6.4

gruntwork-io / terragrunt