### Terraform Version ```shell terraform version Terraform v1.15.0 on linux_arm64 + provider registry.terraform.io/hashicorp/aws v4.31.0 ``` ### Terraform Configuration Files ```terraform terraform { backend "s3" { key = "terraform/tf-my-project" region = "ap-southeast-2" } } provider "aws" { region = "ap-southeast-2" } ``` ### Debug Output ``` │ Error: Missing required argument │ │ on main.tf line 2, in terraform: │ 2: backend "s3" { │ │ The argument "bucket" is required, but no definition was found. ``` ### Expected Behavior Should pass validation, or allow me to supply backend flags like: ``` terraform validate -backend-config="bucket=my-bucket-name-here" -backend-config="dynamodb_table=my-table-here" ``` ### Actual Behavior The CLI tool return `The argument "bucket" is required, but no definition was found.`. ### Steps to Reproduce 1. `terraform init -backend=false` 2. `terraform validate` ### Additional Context Terraform runs on a CI server and is verifying config is valid. When we perform a plan we normally supply `-backend-config` flags and therefore don't have the bucket name in the terraform code. This bucket name varies between our pre-production environment and production so it can't be hard coded. ### References _No response_ ### Generative AI / LLM assisted development? _No response_