I already have tickets on my phone, can I get them refunded after taking out a Navigo Liberté + contract on my phone?

When the phone contains both a Navigo Liberté + contract and single tickets (Metro-Train-RER ticket, Bus-Tram ticket, RoissyBus tickets), the Navigo Liberté + has priority.

Single or booklet tickets are not redeemable. You can continue to use them after cancelling your Navigo Liberté + contract on your phone.