Migrated New MacBook:Photos Library Still Linking to Old MBP:iPhoto Library

[ChetLM]

1. I got a new MacBook and migrated my iPhoto library over network from my Old MBP.
2. I imported this iPhoto library to the new Photos app
3. In Photos, I have set this new library as the System Photo Library
4. On iTunes, when syncing to my iPhone, I get two error messages:
   1. "There was a problem connecting to the server [Old MBP]"
      "[....server may not exist or it is unavailable...]"
   2. After trying to sync (unsuccessfully): "iTunes cannot sync photos to the iPhone because your Photos Library is not yet available. Please try again later"

How can I break the link to the iPhoto library on my old MBP?

Thanks