Essential Concepts: Yes, you can reuse the same URL with a fresh Pin, but the Pin must look and read new. Change the image, title, description, and keywords, then space out posts and track clicks, saves, and impressions.
Using the same URL on Pinterest can work well if each Pin is truly fresh in design and text, especially for evergreen content and product pages. The best results come from clear visual changes, precise keywords, and steady testing through Pinterest Analytics.