The list of bonded bluetooth devices is full, please delete one of the devices using the radio menu

[2012titanium]

We recently picked up a red 2012 Ford Focus Titanium from the dealership with 120k kilometers. It's in good condition, but we noticed a problem with the bluetooth. When we tried to connect a device, it will state that the list of bonded devices is full, and that I have to debond a device. I press the "debond" button to get the Debond menu. It will load for a second, then it will say "No BT devices". I also can't find a debond menu in the radio. Any solutions?

[DaveT70]

Is there a master reset in the menu anywhere? If so this will wipe everything and start again

 

[2012titanium]

The only options in the menu are Audio Settings and clock settings, can't find any master reset.