How to change wordpress permalink structure without changing old URLs?
Current URL: domain.com/this-is-mypost/
Let's say we have hundreds of such posts with URL formatted like that mostly /%postname%/
Now if we change this URL structure to say -
New URL: domain.com/45345/this-is-my-post/ , that is /%post_id%/%postname%/ then that changes the URL format of the old URls as well.
I'm wondering if there's a way to ensure that only new URLs are created with the new format and the old URLs remain intact.
Does anyone know how to do that?