cdktfでS3Backendのkeyを切り替えられない

    new S3Backend(this, {
      bucket: config.terraformBackend.s3.bucket,
      key: `cdktf/sg${process.env.ENV_ID}.tfstate`,
      region: config.terraformBackend.s3.region,
      encrypt: true,
    });

 cdktf diff ${ENV_ID}