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 temperatureIdentification data
All ducati motorcycles have two identification numbers, for
frame (fig. 1) And engine (fig. 2).
Note
These numbers indicate the motorcycle model and
should be quoted when ordering spare parts.
...
Seat
Seat
Seat cover
Rubber mounting
Special screw
Plate
Latch
Spare parts catalogue
Diavel abs seat
Diavel carbon
abs
seat
Important
Bold reference numbers in this section identify parts not shown in the
figures alongside the text, but which can be found in
the exploded view ...
Side stand button
Introduction
The side stand button is located on the side stand. Together with the signal
from the clutch button and the neutral signal
generated by the gear sensor (transmitted to the engine control unit over the
can line), the side stand position signal is
used to enable or disable engine s ...