Greetings:
I've built an entire app in Power Apps Studio with Dataverse tables as the data source (including two many-to-many relationships). Recently I found out that my company won't support the extra cost of using a Premium connector so I'm looking to move everything in the solution (app and data tables) to Teams, where using Dataverse won't involve extra licensing beyond what we have now.
I've done a little research on this topic and the advice I'm seeing is to first migrate the data using Data Flows to Teams and then export/import the app itself. It's the first step in this process where I am currently stuck (because of my ignorance about Data Flows). After selecting the tables that I want to add to Teams from my default environment and then trying to publish the new tables, I keep getting errors about reserved column names for the alternate key columns. Here's just one example:

I'm getting this error for all the tables I'm trying to migrate, including the intersection tables used in the many-to-many relationships.
What's the right way to avoid the above issue? Do I have to remove the column before publishing?
Also, there's a good chance that I'm doing things wrong in this process right from the start. Is there a good, comprehensive, guide available for moving an app that uses Dataverse from Power Apps to Power Apps for Teams?