This enhancement was made available with the Dec 20 2019 patch.
With this enhancement, a pop-up displays when a learner attempts to register for a session that conflicts with the time and date of another session for which they are already registered. This allows the learner to decide if they want to register for the session despite the conflict or stop the registration process for the new session.
If the learner would like to cancel their registration request, they can click the button in the upper-right corner of the pop-up. If the learner would like to proceed with registering for the training despite the scheduling conflict, they can click the button. The registration request will be completed, and the user will have multiple sessions scheduled for the same time on their transcript.