Differences between slug and rank_math_permalink

Hello @momo-fr,

Thank you for contacting Rank Math support.

Please note that Rank Math no longer uses rank_math_permalink meta key for posts and pages. It is only used for the authors.

Meanwhile, you can remove the meta key or ignore it, as it will not be used for any functionality of our plugin. You can check the permalink section of our plugin’s snippet editor to confirm that it is showing the correct slug:
https://rankmath.com/wp-content/uploads/2021/11/Edit-permalink-in-Rank-Math-Snippet-Editor.png

Hope that helps.