`wizard` command without parameter erases saved keypair
? Membership validity duration: 2592000
? Number of blocks on which is computed median time: 20
? The average time for writing 1 block (wished time) 300
? Frequency, in number of blocks, to wait for changing common difficulty: 10
? Weight in percent for previous issuers: 1
? Key's salt
? Key's password
We can see here that we are asked for key's salt and password, even if these has already been used to derive a keypair. If we just type "Enter", then a new keypair is generated on empty values, erasing previously derived and saved keypair.