Bellagio user code for dashboard ECU

My dashboard is faulty in that the diagnostic button and speedometer are non functional. I have a second hand Stelvio dash that I would like to use as replacement but on connecting to bike I get message “insert code”. I have heard that one can retrieve or reset the code using the diagnostics but mine is non functional. The dealer who sold me the bike second hand has no record of any code --any ideas? Will plugging in a diagnostic reader help?

IIRC you can do some sort of Mexican 2 step if you have both keys - I’ll try and remember where I saw that

Failing that Carmo might be your saviours