Blog posts problem after changing siteurl

Actually the problem is with this blog.

https://www.seocontentonline.com/blog

I was making alterations in the blog and accidentally changed the siteurl to https://www.seocontentonline.com

But later on from internet, I searched for some steps and restored that siteurl to the original value https://www.seocontentonline.com/blog

Although, the front page of blog is working fine now, but the individual pages of posts are not working. If I click the link of those posts, they show the page of the original site (to which i changed the link previously). Please help me out with this problem.