Is there a way to change the canonical tag in the source code of an article?

[Kevin Nguyen]

Hi all,

I'm wondering if there's a solution for this. I'm cross-posting some content from our knowledge base on Confluence to our main site on a different domain. I want to canonicalize the article on our main site. 

I installed an HTML macro app to implement my custom canonical tag; however, I noticed that there is a self-referencing canonical tag already implemented within the code. Is there any way to circumvent this, or delete the self-referencing canonical tag?

Thanks!