Parrot V5.10c User Manual Fix 〈WORKING ◎〉

The Parrot v5.10c system can store up to three different mobile phones in its memory. If you cannot pair a new device because the memory is full, you may need to perform a factory reset:

The Parrot v5.10c utilizes a "pass-through" system. parrot v5.10c user manual

How to reset a Parrot CK3100 handsfree car kit - JustCarKits The Parrot v5

You have two options: