Equip the Sound Recorder from your inventory
Turn it on before entering the ghost area
Aim it toward the sound source or ghost activity
Stay close enough...
Open the Equipment/Loadout menu before starting the contract
Select the headgear item you want to remove
Unequip it or replace it with another item
If already in...
Reach level 100
Open the main menu
Go to the Player or Career section
Select Prestige
Confirm the prestige reset
Start again at level 1 with prestige unlocked