My iPhone asked me to choose a different passcode and allowed me to enter a 7-digit passcode. Now I am trying to provide that 7-digit passcode while setting up a new phone, but is does not let me enter any 7-digit passcode as is requests old passcode

My iPhone asked me to choose a different passcode and allowed me to enter a 7-digit passcode. Now I am trying to provide that 7-digit passcode while setting up a new phone, but is does not let me enter any 7-digit passcode as is requests "Enter Passcode for Other iPhone". This is clearly a bug! Allowing users to choose a 7-digit passcode when the passcode becomes too old, and then not allowing to enter a 7-digit Passcode when at the setup of a new phone you ask the user "Enter Passcode for Other iPhone"...

What to do?