Duplicate H1 on blog pages

Hi,

For SEO purposes, we’re supposed to only use 1 <h1> tag per page.

The blog pages, by default, have 2 <h1> tags.

Will you help me remove the second <h1> title in the post’s body by default for all new posts?

URL: http://9j9.365.myftpupload.com/test-event-december-20-2020/