unable to deselect additional participant profile if primary participant profile selected

when configuring an event for online registration, if you choose profiles for the primary participant, the only options available for additional participants is to use the same profile or select a specific profile. there is no option to have no profile.

let's say for my primary participant I implement 1 profile for the top, and 1 for the bottom. but for my additional participant, I only need 1 for the top. there currently is no way to do that, short of creating an "empty" profile workaround.