"aws_cloudwatch_log_subscription_filter" 's argument "role_arn" doesn't produce changes if set to null

[francescosolari0]

Terraform Core Version

1.6.2

AWS Provider Version

5.34.0

Affected Resource(s)

After changing the argument role_arn to null for the previously-created resource aws_cloudwatch_log_subscription_filter i got a "no changes" message in my plan

Expected Behavior

When changing the role_arn value from "anything" to "" or null i would expect my next plan to show some changes, more precisely i would expect the following error: "role_arn" (anything) is an invalid ARN: arn: invalid prefix

Actual Behavior

The plan run after changing the argument's value shows no changes

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

locals {
  choice = true
}

resource "aws_cloudwatch_log_subscription_filter" "this" {

  count           = local.choice ? 1 : 0

  name            = "name"
  role_arn        = null
  log_group_name  = "log group name"
  filter_pattern  = ""
  destination_arn = "a valid arn"
  distribution    = "ByLogStream"
}

Steps to Reproduce

1. Create an aws_cloudwatch_log_subscription_filter
2. Set the value of the argument role_arn to a valid arn
3. Run an apply and create the resource on AWS
4. Change the value of the argument role_arn to "" or null

Debug Output

No response

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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