Installing Facebook for WooCommerce

Hi
I pixelyoursite plugin and it’s great.
Now I want to add Facebook for Woocommerce plugin.
After I install the plugin I have to set it up.
When I get to the Install the Facebook Pixel step I get a warning

We have detected that your pixel, www Pixel, has recent activity on your site. If you have installed the pixel using another extension or manually we recommend removing it before continuing, otherwise ad reporting may be inaccurate. You can use the Pixel Helper Tool after completing setup to verify that your pixel has been correctly installed.

Should I ignore it?

Also in settings>Facebook for WooCommerce Integration, do I have to choose Use Facebook for WooCommerce extension content_id logic or Use PixelYourSite content_id logic?

Thank you in advance!