How to remove default Currency from Frappe

I created an accounting app using frappe; no other apps, like erpnext, were installed. Only the rate in INR was displayed when I attempted to add the rate in both INR and NIO. The default currency was not set in my instance, so if I need the rate in NIO, it only displays in INR how to change it.

Check “Session Default setting” (Your URL/app/session-default-settings/Session Default Settings), and add Currency