Ok, I understand : the problem is that line=yes can be found in the wiki with a comment "don't use it" and there are many elements with these tags, 1896 according to taginfo, probably not all from you.
I will suggest something more clear and unique like natural=coastline_in_construction.
Easy for you to find all, easy to fix (just remove the "_in_construction" when you are ready) and understandable for all so nobody will delete it.
Best regards