Needing to lock from deleting in writer

So I know this is possible, but for the life of me I can’t figure it out. So I want to basically make a list on the writer, then save it in a way so you can write things in the writer, but the things I previous wrote would never be deleted. Basically, I need this for work. I made a list of things I need to write out with boxes, I want to type in those boxes, but when I am ready to delete the only thing that deletes is what is in the boxes, not the list I made previously.

Insert → Section. You can “protect” a section so its content cannot be changed by accident. In fact, you can even set a password.

Insert the “fixed” content in protected sections and the variable parts in the main document.