You can change your master password as long as you know your current master password. If you cannot remember your master password, you will have to reset it.
Change your master password
On the navbar, expand Privileged Access and select Request Access.
Select the Secrets tab and click Change Master Password.
In the dialog that appears, enter the following information:
Current Password – Your current master password
Password – Your new master password
Confirm Password – Your new master password
Click OK to save the new password.