I am creating a Lead Ad using Conversion Leads. I had previously created one CRM integration, using one pixel (data source). I want to create a new Lead Ad with a different pixel. But when I create a new Lead Ad adset, it is set to the former pixel, and does not seem to allow me to change. This is what it says in the adset:

"CRM integration You have completed Close Conversion Leads integration. Pixel: Pixel ID: "

I have not found any way to change this so far. How do I create a new Lead Ad adset which uses the new pixel?

(The reason this is needed: it will use a different Conversion Leads funnel, with different funnel steps.)