OpenTofu - Importing docker_proxy with index set to type "REGISTRY" causes Error

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Terraform Version

OpenTofu 1.9.0

Nexus Provider Version

2.5.0

Nexus Version

3.75.1

Affected Resource(s)/Data Source(s)

nexus_repository_docker_proxy

Terraform Configuration Files

terraform {
  required_providers {
    nexus = {
      source = "datadrivers/nexus"
      version = "2.5.0"
    }
  }
}
provider "nexus" {
  insecure = true
  password = "<blah>"
  url      = "<blah>"
  username = "<blah>"
}
import {
  to = nexus_repository_docker_proxy.quay
  id = "quay"
}

Debug Output/Panic Output

╷
│ Error: invalid value for docker_proxy.0.index_url (index_url should be in the format 'http://www.example.com')
│ 
│   with nexus_repository_docker_proxy.quay,
│   on gen.tf line 15:
│   (source code not available)
│

Expected Behaviour

Generate a config without error

Actual Behaviour

It does generate the config successfully but blows out the error Error: invalid value for docker_proxy.0.index_url

resource "nexus_repository_docker_proxy" "quay" {
  name         = "quay"
  online       = true
  routing_rule = ""
  docker {
    force_basic_auth = true
    http_port        = 0
    https_port       = 0
    subdomain        = ""
    v1_enabled       = false
  }
  docker_proxy {
    cache_foreign_layers        = false
    foreign_layer_url_whitelist = []
    index_type                  = "REGISTRY"
    index_url                   = ""
  }
  http_client {
    auto_block = true
    blocked    = false
    connection {
      enable_circular_redirects = false
      enable_cookies            = false
      retries                   = 0
      timeout                   = 0
      use_trust_store           = true
      user_agent_suffix         = ""
    }
  }
  negative_cache {
    enabled = true
    ttl     = 1440
  }
  proxy {
    content_max_age  = 1440
    metadata_max_age = 1440
    remote_url       = "https://quay.io"
  }
  storage {
    blob_store_name                = "docker-cache"
    strict_content_type_validation = true
  }
}

Steps to Reproduce

1. Have /or Add a docker proxy with the index set to Use proxy registry (specified above)

2. Use provided terraform to try importing AND generating config using the command
   tofu plan -generate-config-out=gen.tf

References

No response