Leon 5f nav upgrade Help

[sxi20vt]

Hi guys i have a 2013 Leon with a non nav head unti so I swapped the screen and 5f unit to a mib 1 with nav.my issue is the phone works and voice but the nav says Function not supported. cp has been removed and install list updated also tried genuine nav update via Seat but still the same message.when you start nav it loads the map then displays the message. Amy idea,s would be helpful