[Resolved] New affiliate that is already a user email

In the situation where someone registers to become an affiliate but they are already a user of the site (already purchased a woocommerce product and created an account) they are getting an email with the following content.

New affiliate registration for Lucky You Flowers: has been approved! Log into the site with your existing account and get started.

I can’t seem to edit this email content in the Settings/Messages tab. I have changed several others but this one does not seem to be available. Is there some way I can change that one as I want to be able to add more detailed content welcoming them and giving some instructions and their affilate link.

I am using manual approval for new affiliates.

Thanks,