I've created/deleted several 'About' pages. My current one has slug 'about-3'. I tried to change it to just 'about', but wp keeps changing it back to 'about-3'. Using phpMyadmin, I see all my 'deleted' About pages as rows in 'wp_posts' with 'trash' in post_status column. I also see the slug values in the 'post_name' column, and 'about' is in use for one of the 'trash'd pages. And I see 'about-3' for my current About page.
Is it ok to delete these 'trash'd rows from wp_posts? (I'm assuming wp will then let me use 'about' for the slug