Show Basic Setting Reference, not Combination's Reference

[davidanna23]

Hello,

In my website (Prestashop 1.6.1.15): www.vlaboutique.com, I need to replace Reference Field that appear in Product Page (Front Office):

I want show General Reference of product:

  not the reference of the combination:

 

Can I fix this?

I use leo_fashion_store theme.

I tryed to ask to Leo Theme Support, but they want money for fix this.

In my opinion I should modify the product.tpl file, in particular this piece of code:

<p id="product_reference"{if empty($product->reference) || !$product->reference} style="display: none;"{/if}>
<label>{l s='Reference:'} </label>
<span class="editable" itemprop="sku"{if !empty($product->reference) && $product->reference} content="{$product->reference}"{/if}>{if !isset($groups)}{$product->reference|escape:'html':'UTF-8'}{/if}</span>
</p> 

But I do not know how I can do it.
Can you help me? Thank you