Why am I being asked to complete the Rocket League New Driver Challenges again?

Some players are being asked to complete the Rocket League New Driver Challenges again in order to access certain features (such as the Competitive playlist) after changing their Primary Platform.

This is intended and if you have recently switched your Primary Platform, please complete the New Driver Challenges again on your new primary platform.

If you are affected by this and are currently in a party, please make sure that all players in the party have already completed the New Driver Challenges.