Delete Voicemail greetings

I am not able to delete any voicemail greetings, I can’t do it on freePBX or on the usercontrol panel or with the extension. How can we delete a voicemail greeting ?

Figured it out guys,

After login , navigate to this folder
Navigate to the extension where you want to delete the voicemail. Then delete the unavailable.wav or busy.wav …
Asterisk is smart to configure itself back to the normal mode.