[Bug]: Unable to ignore changes to RDS Postgres minor engine version

Terraform Core Version

1.9.5

AWS Provider Version

5.69.0

Affected Resource(s)

aws_db_instance

Expected Behavior

Terraform should ignore the minor Postgres versions upgrade when auto_minor_version_upgrade = true. (auto_minor_version_upgrade is true by default)

Actual Behavior

api error InvalidParameterCombination: Cannot upgrade postgres from 13.15 to 13.13

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

resource "aws_db_instance" "db_instance" {
  identifier              = "${var.env_name[var.environment]}-db-instance"
  engine                  = "postgres"
  db_name                 = "example_db"
  engine_version          = "13.13"
}

Steps to Reproduce

Run terraform plan

Terraform will perform the following actions:

  # aws_db_instance.db_instance will be updated in-place
  ~ resource "aws_db_instance" "db_instance" {
      ~ engine_version                        = "13.15" -> "13.13"
        id                                    = "db-someID"
}

Run terraform apply

api error InvalidParameterCombination: Cannot upgrade postgres from 13.15 to 13.13

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

This patch does not seem to fix the issue with Postgres versions: https://github.com/hashicorp/terraform-provider-aws/issues/1198

Postgres versioning: https://www.postgresql.org/docs/release/

Would you like to implement a fix?

None

hashicorp / terraform-provider-aws

[Bug]: Unable to ignore changes to RDS Postgres minor engine version #39579

Terraform Core Version

AWS Provider Version

Affected Resource(s)

Expected Behavior

Actual Behavior

Relevant Error/Panic Output Snippet

Terraform Configuration Files

Steps to Reproduce

Debug Output

Panic Output

Important Factoids

References

Would you like to implement a fix?

Community Note