{
  "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "resourceLocation": {
      "value": "East US"
    },
    "vmSku": {
      "value": "Standard_DS1"
    },
    
    "vmssName": {
      "value": "GEN-UNIQUE-32"
    },
    "instanceCount": {
      "value": 5
    },
    "adminUsername": {
      "value": "ubuntu"
    },
    "adminPassword": {
      "value": "GEN-PASSWORD"
    }
  }
}

{
  "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "resourceLocation": {
      "value": "East US"
    },
    "vmSku": {
      "value": "Standard_D1"
    },
    
    "vmssName": {
      "value": "GEN-UNIQUE-32"
    },
    "instanceCount": {
      "value": 5
    },
    "adminUsername": {
      "value": "ubuntu"
    },
    "adminPassword": {
      "value": "GEN-PASSWORD"
    }
  }
}

Change default parameter to standard
Change default parameter to standard
