Custom Post Type and Slug conflict

I’ve been messing around with custom post types (CPT) on a website for work (https://www.johnhartusa.com/) and I gave the CPT a particular slug and decided not to use the CPT.

I deleted it from my function.php file and wanted to use the same slug for a normal page.

When I try to use it, it doesn’t work, if I try to visit the page it doesn’t work when using the slug from the old CPT.

I when through wordpress database and deleted all remanents of the old slug that I could see in wp_posts, but it had no effect. I’m still having a conflict problem.

If anybody has any ideas on this, it would help me out big time!!