How do I make 301 redirection from `/%post_id%/` to `/%postname%/`?
My permalinks is set to
/%post_id%/ (post id).
I want to change them all to
/%postname%/ (which is the post slug).
Problem is, whenever I change it, it gives 404 errors from my old page urls.
for example, this: https://elrons.co.il/1779/
should change to: https://elrons.co.il/pil-kahol-font/
But it gives 404 instead.
How do I make 301 redirection from