I have recently been made a Curator/admin of my client's Alteryx Server, and am having trouble sharing a data connection with a particular user. For several data connections, I was able to share with Sahil P. (a premium Artisan) just fine. However, for other data connections, whenever I try to share with that user, I can only share with his private studio.

However, I'm able to share the same data connection with a Viewer

Any thoughts as to why I can't share this data connection with the first user?