We have been using Cuseum's digital card program for about a year now and have been very happy with it. Currently, I pull the membership data from a query and manually upload it to Cuseum. We did this because we were experiencing lots a duplicates and errors in the query (due to some bad data). We've cleaned this up for the most part, and I am beginning to look to fully integrating with Cuseum to make the upload process automatic.
So, my question is:
We offer some folks who specifically request it at certain levels a “Guest of" card. Example in the photo below, Gwynne McDevitt is on one card and the second card says “Guest of Gwynne McDevitt”. We do not create an additional record for the Guest of card. We simply edit the name on the card in the “Member Cards” section.
This is creating an issue for Cuseum's integration because their system will read these two records as duplicates (because they are both Gwynne McDevitt with the same Lookup ID). Other than creating a new record for the Guest (which isn't ideal), are there any other options that would solve the Lookup ID issue? Or do I need to find a way to exclude these members from my query?

Any thoughts are appreciated!