State sync with S3 backend

Terraform
1

I’m relatively new to Terraform so I suspect I’m missing something simple here.

I setup a number of TF resources in a project using an S3 backend with this config:

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = ">= 4.16"
    }
  }

  backend "s3" {
    bucket         = "my-tf-state-bucket"
    key            = "terraform.tfstate"
    dynamodb_table = "terraform-locks"
    region         = "us-east-1"
    profile        = "my-profile"
  }

  required_version = ">= 1.2.0"
}

provider "aws" {
  region  = var.region
  profile = var.profile
}

Everything has been working fine until I pulled the Git repo on a second computer. I went to do some work on that machine after running terraform init and selecting my workspace, I ran terraform plan and it wants to make 20 additions, 4 changes, and 16 deletions.

Running terraform plan on the first machine shows no changes.

What have I missed?