Amazon web services – Terraform : wait till the dynamodb table status is "Active"

Terraform probably tries to create the item in the table first (due to the parallelism), because there are no implicit dependencies between the table and the item. Implicit dependencies are created by referencing an attribute of a resource or an output of a module. The module does not provide an output which would be helpful. In this case, you might try using depends_on meta-argument so you tell terraform to create the table prior to trying to create the item. So for example, you would do the following:

module "dynamodb_table" {
  source   = "terraform-aws-modules/dynamodb-table/aws"
  name     = "${var.aws.region}-${var.config.dynamodb.table_name}"
  hash_key = var.config.dynamodb.hash_key
  attributes = [
    {
      name = var.config.dynamodb.hash_key
      type = "S"
    }
  ]
  billing_mode = "PAY_PER_REQUEST"
  table_class  = "STANDARD"
}

resource "random_string" "random" {
  length  = 16
  special = false
}

resource "aws_dynamodb_table_item" "table_item" {
  depends_on = [module.dynamodb_table]
  table_name = "${var.aws.region}-${var.config.dynamodb.table_name}"
  hash_key   = var.config.dynamodb.hash_key
  item = <<ITEM
  {
    "${var.config.dynamodb.hash_key}": {"S": "${random_string.random.result}"},
    "collections": {"M": {}}
  }
  ITEM
}