[BUG]: github_repository_environment fails to refresh when an Enterprise Team is a required reviewer (reviewer.Type "BusinessTeam")

[Reinkens]

Expected Behavior

Reading/refreshing a github_repository_environment whose required reviewers include a GitHub Enterprise Team should succeed — either representing that reviewer in state, or ignoring it gracefully.

Actual Behavior

Any plan/apply that refreshes the resource fails:

Error: reviewer.Type is *string, not a string of 'User' or 'Team', unable to unmarshal

  with github_repository_environment.notify_gate["<repo>"],
  on main.repos.tf line 232, in resource "github_repository_environment" "notify_gate":
 232: resource "github_repository_environment" "notify_gate" {

Because Terraform refreshes the whole state, a single environment with an Enterprise Team reviewer blocks every plan/apply in the workspace, including for completely unrelated resources. The resource becomes unmanageable until the Enterprise Team reviewer is removed out-of-band via the REST API or UI.

Terraform Version

Terraform v1.15.8
on windows_amd64
+ provider registry.terraform.io/integrations/github v6.13.0

GitHub Installation Type

• GitHub.com (Free, Pro, or Team)
• GitHub Enterprise Server (on-premises)
• GitHub Enterprise Cloud with Personal Accounts (github.com)
• GitHub Enterprise Cloud with Managed Users/EMU (github.com)
• GitHub Enterprise Cloud with Data Residency (*.ghe.com)
• I don't know

Affected Resource(s)

• github_repository_environment (read/refresh path)
• Likely anything else decoding required reviewers from the environments API (e.g. the corresponding data source)

Terraform Configuration Files

resource "github_repository_environment" "notify_gate" {
  for_each    = var.repositories
  environment = "notify-gate"
  repository  = github_repository.iac[each.key].name

  reviewers {
    users = [2363016, 1317356] # two named users
  }
}


The Enterprise Team reviewer is **not** declared in Terraform — it was added out-of-band, which is enough to break refresh permanently. There is also no way to express an Enterprise Team in the `reviewers` block (`users`/`teams` only), so it cannot be adopted into config as a workaround.

Steps to Reproduce

1. On GitHub Enterprise Cloud with data residency + Enterprise Managed Users, create an environment with required reviewers via Terraform (users and/or org teams).
2. Add an Enterprise Team as an additional required reviewer via the UI or PUT /repos/{owner}/{repo}/environments/{environment_name}.
3. Run terraform plan → the error above. It persists until the Enterprise Team reviewer is removed.

Debug Output

GET /repos/{owner}/{repo}/environments/{environment_name} returns a reviewer whose top-level type is BusinessTeam, with a nested reviewer object of type: "enterprise":

{
  "type": "BusinessTeam",
  "reviewer": {
    "name": "<enterprise team name>",
    "id": 2418211,
    "slug": "ent:<enterprise-team-slug>",
    "privacy": "closed",
    "type": "enterprise",
    "enterprise_id": 23181,
    "permission": "pull",
    "parent": null
  }
}

For contrast, a normal user reviewer in the same response is "type": "User".

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

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[deiga]

Please actually include debug level logs of the plan/refresh run