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 temperatureExplanation of the function of the ride-by-wire system
Mechanism
Via metal cables, the throttle grip operates a roller mounted on one end of a
spindle located near the horizontal cylinder
throttle valve spindle.
The aps sensor, which measures the position of the throttle grip itself, is
mounted on the opposite end of this spindle.
A mechanic ...
Protective apparel
Always wear a helmet. Most motorcycle accident fatalities
are due to head injuries.
For safety eye protection, gloves, and high top, sturdy boots
should also be worn.
The exhaust system becomes very hot during operation,
never touch the exhaust system. Wear clothing that fully
covers your ...
Cylinder/piston assemblies
Piston
Gudgeon pin circlip
Gudgeon pin
Set of piston rings
Cylinder-crankcase gasket
Water pump outlet union
Hose clip
Horizontal cylinder coolant inlet hose
Vertical cylinder coolant inlet hose
Cylinder barrel
Cylinder head gasket
Bush
Spare parts catalogue
Diavel a ...