Link is redirecting to wrong post

Hello,

I have a single post post within a category that once clicked sends you to another post from a completely different category.

The link path should be:
Home / North Wales BOW / Hawarden Estate Farm Shop

But instead takes you to:
Home / News from around Wales / Hawarden Estate Farm Shop announce half term events.

Here’s the link to where this is happening: https://www.welshcountry.co.uk/category/north-wales-bow/

I’ve checked the urls, slugs and categories for both posts and all are correct and different from one another. Within the category the snippet displays the correct post but once clicked redirects. The post is also redirected if the url is typed in the browser address bar.

I’ve also tried deleting the foreign post (announce half term events) hoping that it would then pick up the correct post but it then creates a 404 error instead.

The only thing that will work is changing the url but I’d rather avoid that if possible as that would break any links from external sites to this post.
e.g:
Old: https://www.welshcountry.co.uk/hawarden-estate-farm-shop/
New: https://www.welshcountry.co.uk/hawarden-estate-farm-shop-2/

Thanks in advance