Facebook Photo not what I want

How do I get my Facebook post photo to be different when I share the OwnerRez link to my property on Facebook.  When I put the web link in to Ownerrez website, it is pointing to an old photo and despite making some changes in various places, it is not changing.  TIA!

Facebook has some funny caching issues. Here's more information on how to fix that:

https://www.ownerrez.com/support/articles/hosted-facebook-sharing