"Blank Form" explaining IRA basis change from my 2017 return included in 2021?

For my 2017 return, I had to explain some IRA basis changes and this was included on a form titled "Blank Form".

 

When I saved a copy of my 2021 return (no worksheets), I noticed that this form from 2017 is included. I checked returns from 2018-2020 and noticed the form is there as well. How do I remove this?