BC break from 0.30.0 to 0.30.2

[ipc-zpg]

Describe the Bug

Updating from 0.30.0 to 0.30.2 causes SSM parameter to be deleted.

see also: #127

code was:

module "documentdb_cluster" {
  source = "cloudposse/documentdb-cluster/aws"

  # NOTE: DO NOT UPGRADE TO 0.30.1.  It has some strange password behaviour. see - https://github.com/cloudposse/terraform-aws-documentdb-cluster/issues/127
  version = "0.30.0"

  name = "${var.env}-shared-docdb"

  allowed_security_groups    = local.docdb_security_groups
  apply_immediately          = true
  auto_minor_version_upgrade = true
  cluster_family             = "docdb5.0"

  cluster_parameters = [{
    name         = "tls"
    value        = "enabled"
    apply_method = "pending-reboot"
  }]

  preferred_backup_window      = "01:00-03:00"
  preferred_maintenance_window = "fri:03:00-fri:05:00"

  cluster_size              = var.documentdb_instance_count
  engine_version            = "5.0.0"
  master_username           = "redacted"
  instance_class            = var.documentdb_instance_type
  ssm_parameter_enabled     = true
  ssm_parameter_path_prefix = "/${var.env}/docdb/master-password/"
  subnet_ids                = module.vpc.private_subnets
  vpc_id                    = module.vpc.vpc_id
  ca_cert_identifier        = "rds-ca-rsa2048-g1" # https://docs.aws.amazon.com/documentdb/latest/developerguide/ca_cert_rotation.html
}

the plan shows:

  # module.documentdb_cluster.module.ssm_write_db_password.aws_ssm_parameter.default["/wibble/docdb/master-password/wibble-shared-docdb"] will be destroyed
  # (because key ["/wibble/docdb/master-password/wibble-shared-docdb"] is not in for_each map)

The only diff for this plan is:

diff --git a/platform/documentdb.tf b/platform/documentdb.tf
index redacted 100644
--- a/platform/documentdb.tf
+++ b/platform/documentdb.tf
@@ -9,7 +9,7 @@ module "documentdb_cluster" {
   source = "cloudposse/documentdb-cluster/aws"

   # NOTE: DO NOT UPGRADE TO 0.30.1.  It has some strange password behaviour. see - https://github.com/cloudposse/terraform-aws-documentdb-cluster/issues/127
-  version = "0.30.0"
+  version = "0.30.2"

   name = "${var.env}-shared-docdb"

Expected Behavior

This is a minor release, and should therefore not have any changes in the plan.

Steps to Reproduce

Upgrade from 0.30.0 to 0.30.2

Screenshots

No response

Environment

No response

Additional Context

No response