ERROR: Duplicate Record

I am Building a test solution, to test I aim to create a duplicate template of an Account on click of button, plugin then fires to include the copy of all the contacts related.

I am currently doing something Similar to this post

However: Here is the bit of code...

function CopyAccount() {  

  //Collect values from the existing CRM form that you want to default onto your new record   

    var GUIDvalue = Xrm.Page.data.entity.getId();  

  var Namevalue = Xrm.Page.getAttribute("name").getValue();
   if (GUIDvalue != null && Namevalue != null)  

  {       var parameters = {};      

 parameters["new_templateid"] = GUIDvalue;     

  parameters["name"] = Namevalue;   

    Xrm.Utility.openEntityForm("account", null, parameters);

   }

I Get an Error: SCRIPT5022: id must not be null.

Comes from global.ashx?ver=-1477464416, line 6 character 372572

Xrm.Utility.openEntityForm=function(name,id,parameters){     

 if(IsNull(name)) trow Error.create("name must not be null.");   

   if(IsNull(id)) throw Error.create("id must not be null.");  

    if(IsNull(parameters)) throw Error.create("parameters must not be null.")

Any Ideas?