There is a problem that the product is put in the cart when I press the Sold out button

[Andy1121]

Theme - Ella version 5.1.0

Hi!

I'm not an expert, I made a website by Googling

I found an error while modifying our website.

The product's inventory quantity is 0 and add to cart button is automatically changed to SOLD OUT but I can still click the SOLD OUT button and the product goes into the cart. But I cannot purchase it.

https://tirtir.us/collections/shop/products/centella-foam-cleansing

<input type="submit" name="add" class="btn" id="product-add-to-cart" value="Sold Out">

It should be 

<input type="submit" name="add" class="btn" id="product-add-to-cart" disabled value="Sold Out">

My product-template-default.liquid is below.

                       <div class="groups-btn">
                          <div class="groups-btn-tree {% if section.settings.display_product_detail_share or settings.enable_wishlist %}margin-button{% endif %}">
                            {% if current_variant.available %}
                          
                            {% if current_variant.inventory_management %}
                            {% assign first_inventory = current_variant.inventory_quantity %}
                          
                            {% if first_inventory > 0 %}
                            <input data-btn-addToCart type="submit" name="add" class="btn" {% if settings.enable_multilang %}data-translate="products.product.add_to_cart"{%endif%} id="product-add-to-cart" value="{{ 'products.product.add_to_cart' | t }}" data-form-id="#add-to-cart-form">
                            {% else %}
                            <input data-btn-addToCart type="submit" name="add" class="btn" {% if settings.enable_multilang %}data-translate="products.product.pre_order"{%endif%} id="product-add-to-cart" value="{{ 'products.product.pre_order' | t }}" data-form-id="#add-to-cart-form">
                            {% endif %}
                          
                            {% else %}
                            <input data-btn-addToCart type="submit" name="add" class="btn" {% if settings.enable_multilang %}data-translate="products.product.add_to_cart"{%endif%} id="product-add-to-cart" value="{{ 'products.product.add_to_cart' | t }}" data-form-id="#add-to-cart-form">
                            {% endif %}
                          
                            {% else %}
                            <input type="submit" name="add" class="btn" {% if settings.enable_multilang %}data-translate="products.product.unavailable"{%endif%} id="product-add-to-cart" disabled value="{{ 'products.product.unavailable' | t }}" >
                            {% endif %}

                            {% if section.settings.display_product_detail_share %}
                              <a class="icon-share" href="javascript&colon;void(0)" aria-label="{{ 'products.product.share' | t }}" {% if settings.enable_multilang %}data-translate="products.product.share" {%endif%}>{% render 'icon-share' %}</a>
                            {% endif %}
                          </div>
                       </div>

Can someone help me to fix it?

Thank you in advance.