Reset TOTP token for WebAdmin

I need to reset the 2FA TOTP token for WebAdmin as I have lost the old token (foolishly I deleted it from my authenicator app!)

I thought I could disable 2FA using CLI as follows …

telnet localhost 7000
user admin
< password for admin >
config server
config webadmin
set twoFactorAuthEnabled disabled
commit
commit
save config
quit

… and then go back in to WebAdmin and re-enable 2FA and thus reset/recreate a new TOTP token. Unfortunately is uses the old token.

So, is there a way I can delete the old token and generate a new TOTP token for WebAdmin?