fb:admins problem in Facebook debugger

I have been trying to scrape the following link:
http://whitsundaymobilemarketing.com.au/blog/2015/07/01/how-to-drive-organic-posts-back-to-your-website/

And I receive the following error:

Errors That Must Be Fixed
Object Invalid Value Object at URL ‘http://whitsundaymobilemarketing.com.au/blog/2015/07/01/how-to-drive-organic-posts-back-to-your-website/’ of type ‘article’ is invalid because the given value ‘874553062577664’ for property ‘fb:admins’ could not be parsed as type ‘fbid’.

I have recovered my fbid but I’m not sure where to add it to change the one that keeps coming up… Any ideas please?

Kind regards
Eva Browne-Paterson

https://wordpress.org/plugins/wordpress-seo/