how to auto overwrite existing post/permalink

hi,

is there a hack to automatically overwrite existing post or permalink if the title is the same?

For example, i made a post with title “wordpress rules” and it made a permalink of
example.com/wordpress-rules.htm

then on another day, i thought i should write a new post (not edit the old post) and used the title “wordpress rules” again.
i want the output permalinks to be
example.com/wordpress-rules.htm
and not
example.com/wordpress-rules-2.htm
as wordpress would automatically add an increment number to the permalinks.