Using aws_ssm_parameter with Workspaces to share data across modules in different repositories

I need your help. I am trying to use workspaces for differentiating environments, plus ssm_parameter to store configuration to be shared.

For example:
On one repo:
resource “aws_ssm_parameter” “cluster_name” {
name = “${terraform.workspace}-cluster-name”
type = “String”
value =
which creates the paramter production-cluster-name on Parameter Store

and on the other repo when I try to retrieve it:

data "aws_ssm_parameter" "cluster_name" {
 name  = "${terraform.workspace}-cluster-name"

It complains with:

*Error: Error describing SSM parameter: ParameterNotFound: *

status code: 400, request id: 49a02e8a-8974-4504-a1a4-e52593b7657a

on line 1, in data “aws_ssm_parameter” “cluster_name”:

1: data “aws_ssm_parameter” “cluster_name” {

There is something basic I am not getting.
Thanks in advance