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Binding a dynamic checkbox to user preferences

I am working on a user account page where they can edit their name and other preferences. We have a list of channels in the site and we want to allow users to opt in / out of following them. I setup a group with type of content set to user and current user and have a field above it working and binding correctly.
Screen Shot 2022-06-23 at 4.22.15 PM

In order to loop an output of checkboxes, I setup a repeating group and I set the content type to opt channel. I think this is where the problem is but I am not sure another method in how to approach this.

When I try and bind the checkboxes, it gives a message:
Screen Shot 2022-06-23 at 4.22.46 PM

I get a list of checkboxes, but it just doesn’t save it if you check them.
Screen Shot 2022-06-23 at 4.23.09 PM

How can I get this type of configuration to work?