Is there an easy way to hide the link once one node is created using the link?

I have a content type of "program" and a content type of "schedule" that references program. I setup the reference url to display a link on the program node. However, once the site admins create a schedule for a program, I don't want that link there anymore. I feel like it could confuse them. Any help with this would be appreciated.

Also, I love this module and I use it all of the time. So thank you for the module.