Only tags that are already in this notebook can be added to this note.

[SixSierras 1]

Hello! I am relatively new to EN. I share several notebooks with a client and cannot get the tags to work properly. I understand that the tags be originated in the owner's notes, so I created a note that contains all the tags we need. I then exported the note for my client to import into the notebooks shared with me. My client imported the note into each of the notebooks. The problem: the tags work in one notebook, but not the others. Any suggestions on what we may be doing wrong?