Submitting teacher recs for two high schools, current one uses Naviant, the previous one does not?

<p>Posting on behalf of my son. He had to change high schools before his senior year, so all his teacher recommendations are coming from his previous high school. He will also have a guidance letter from his previous high school. His old school does not use Naviant in the Common App, but his new one does. He had to link his common app to Naviant per instructions from his new school so that the guidance letter from the new school could be uploaded. Now he cannot invite his old teachers to upload their recommendation letters? Anyone have any experience with this? Thanks in advance. </p>