[Bug]: Provider produced inconsistent final plan

[cwoollard]

Terraform Core Version

1.3.7

AWS Provider Version

4.49.0

Affected Resource(s)

aws_wafv2_web_acl

Expected Behavior

Terraform apply

Actual Behavior

Error: Provider produced inconsistent final plan

Relevant Error/Panic Output Snippet

│ Error: Provider produced inconsistent final plan
│ 
│ When expanding the plan for aws_wafv2_web_acl.api_waf to include new values learned so far during apply, provider "registry.terraform.io/hashicorp/aws" produced an invalid new value for .rule: planned set element
│ cty.ObjectVal(map[string]cty.Value{"action":cty.ListValEmpty(cty.Object(map[string]cty.Type{"allow":cty.List(cty.Object(map[string]cty.Type{"custom_request_handling":cty.List(cty.Object(map[string]cty.Type{"insert_header":cty.Set(cty.Object(map[string]cty.Type{"name":cty.String,
│ "value":cty.String}))}))})), "block":cty.List(cty.Object(map[string]cty.Type{"custom_response":cty.List(cty.Object(map[string]cty.Type{"custom_response_body_key":cty.String, "response_code":cty.Number,
│ "response_header":cty.Set(cty.Object(map[string]cty.Type{"name":cty.String, "value":cty.String}))}))})),
│ 
│ "visibility_config":cty.ListVal([]cty.Value{cty.ObjectVal(map[string]cty.Value{"cloudwatch_metrics_enabled":cty.True, "metric_name":cty.StringVal("mo-apigateway-waf-AWSManagedRulesCommonRuleSet"),
│ "sampled_requests_enabled":cty.True})})}) does not correlate with any element in actual.
│ 
│ This is a bug in the provider, which should be reported in the provider's own issue tracker.

Terraform Configuration Files

resource "aws_wafv2_web_acl" "api_waf" {
  name        = "${var.resource_name_prefix}-waf"
  description = "MO API Gateway WAF Ruleset"
  scope       = "REGIONAL"

  default_action {
    allow {}
  }

  rule {
    name     = "MO-IPv4IPSet-AllowList"
    priority = 1

    action {
      allow {}
    }

    statement {
      ip_set_reference_statement {
        arn = aws_wafv2_ip_set.ipv4-allowlist.arn
      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-IPv4IPSet-AllowList"
      sampled_requests_enabled   = true
    }
  }

rule {
    name     = "MO-IPv6IPSet-AllowList"
    priority = 2

    action {
      allow {}
    }

    statement {
      ip_set_reference_statement {
        arn = aws_wafv2_ip_set.ipv6-allowlist.arn
      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-IPv6IPSet-AllowList"
      sampled_requests_enabled   = true
    }
  }

rule {
    name     = "MO-IPv4IPSet-BlockList"
    priority = 3

    action {
      block {}
    }

    statement {
      ip_set_reference_statement {
        arn = aws_wafv2_ip_set.ipv4-blocklist.arn
      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-IPv4IPSet-BlockList"
      sampled_requests_enabled   = true
    }
  }

rule {
    name     = "MO-IPv6IPSet-BlockList"
    priority = 4

    action {
      block {}
    }

    statement {
      ip_set_reference_statement {
        arn = aws_wafv2_ip_set.ipv6-blocklist.arn
      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-IPv6IPSet-BlockList"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "MO-API-RateLimit"
    priority = 5

    action {
      block {}
    }

    statement {
      rate_based_statement {
        limit              = 5000
        aggregate_key_type = "IP"
      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-API-RateLimit"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "AWSManagedRulesKnownBadInputsRuleSet"
    priority = 10

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesKnownBadInputsRuleSet"
        vendor_name = "AWS"

      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesKnownBadInputsRuleSet"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "AWSManagedRulesCommonRuleSet"
    priority = 11

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesCommonRuleSet"
        vendor_name = "AWS"

        rule_action_override {
          action_to_use {
            count {}
          }

          name = "SizeRestrictions_QUERYSTRING"
        }

        rule_action_override {
          action_to_use {
            count {}
          }

          name = "NoUserAgent_HEADER"
        }
      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesCommonRuleSet"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "AWSManagedRulesAmazonIpReputationList"
    priority = 12

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesAmazonIpReputationList"
        vendor_name = "AWS"

      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesAmazonIpReputationList"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "AWSManagedRulesAnonymousIpList"
    priority = 13

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesAnonymousIpList"
        vendor_name = "AWS"

      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesAnonymousIpList"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "AWSManagedRulesLinuxRuleSet"
    priority = 14

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesLinuxRuleSet"
        vendor_name = "AWS"

      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesLinuxRuleSet"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "AWSManagedRulesUnixRuleSet"
    priority = 15

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesUnixRuleSet"
        vendor_name = "AWS"

      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesUnixRuleSet"
      sampled_requests_enabled   = true
    }
  }

  rule {
    name     = "AWSManagedRulesSQLiRuleSet"
    priority = 16

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesSQLiRuleSet"
        vendor_name = "AWS"

      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesSQLiRuleSet"
      sampled_requests_enabled   = true
    }
  }
/*
  rule {
    name     = "AWSManagedRulesAdminProtectionRuleSet"
    priority = 17

    override_action {
      none {}
    }

    statement {
      managed_rule_group_statement {
        name        = "AWSManagedRulesAdminProtectionRuleSet"
        vendor_name = "AWS"

      }
    }

    visibility_config {
      cloudwatch_metrics_enabled = true
      metric_name                = "${var.resource_name_prefix}-waf-AWSManagedRulesAdminProtectionRuleSet"
      sampled_requests_enabled   = true
    }
  }
*/

  tags = merge(var.tags, {
    Name = "${var.resource_name_prefix}--waf"
  })

  visibility_config {
    cloudwatch_metrics_enabled = true
    metric_name                = "${var.resource_name_prefix}-waf"
    sampled_requests_enabled   = true
  }

}

Steps to Reproduce

The attached tf file is what is currently applied. If I make any changes it generates that error.

Ideally, I want to uncomment the commented section as I had to get AWS support to increase the WCU units first.

but even modifying the following section to remove 1 of the dashes causes the error

  tags = merge(var.tags, {
    Name = "${var.resource_name_prefix}--waf"
  })

Debug Output

terraform-debug.log

Panic Output

No response

Important Factoids

No response

References

No response

Would you like to implement a fix?

None

[github-actions]

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[ewbankkit]

@cwoollard Thanks for raising this issue.
It has already been noticed in #28191. I'm going to close this one as a duplicate so that we can concentrate discussion in the linked issue.
Please add any additional comments there.

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.