The activation of this (amber yellow) "warning" indicates that the hands free system has detected that the battery that permits the active key (1, fig. 62) To communicate and turn the vehicle on is almost discharged.
Note
In this case, ducati recommends replacing the battery as soon as possible as described in the paragraph "replacing the active key battery" (page 88).

Hands free key (hf) not recognised
High engine coolant temperatureDeactivating the service indication on the dashboard
The message "serv" is displayed on the dashboard, indicating that the
motorcycle should be serviced in accordance with
the programmed maintenance plan. This indication is activated after the first
1000 km and thereafter at intervals of
12000 km.
After the scheduled service has been carried ...
Air intake
Air filter
Right air duct
Screw
Air temperature sensor
Screw
Left air duct
Sealing washer
Threaded insert
Spacer
Clamp
Breather hose
Spare parts catalogue
Diavel abs air intake - oil breather
Diavel carbon
abs
air intake - oil breather
Important
Bold reference num ...
Refitting the timing gears
Before reassembling the removed parts, check timing gears (13) for wear.
Change, if necessary.
Important
The timing gears (13) must always be renewed as a pair.
Refitting is the reverse of removal.
Warning
When introducing the driven gear (b) check that the tongue (15) is
correctly fitted o ...