The activation of this (amber yellow) "warning" indicates that dtc (ducati traction control) has been turned off.
Note
In this case, ducati recommends being very careful when riding as the vehicle behaviour will be different in comparison to when operating with the traction control activated.

Low battery level
Hands free key (hf) not recognisedEngaged gear indicator
This function displays the gears (1, fig. 25).
The instrument panel receives information and indicates the
engaged gear or "n" for neutral.
Note
In the case of a gear sensor "error", a dash "-" (not
flashing) will be displayed.
...
Removing of the rear brake control
Warning
The brake master cylinder manufacturer advises against servicing the
brake master cylinder due to the safety critical
nature of this component.
Incorrect overhaul can endanger the rider and passenger.
Maintenance operations on these units are limited to renewal of the following
par ...
Reassembly of the clutch-side crankcase cover
Fit the plug (14) and the gasket (13). Fit the plug (17) and the gasket (15).
If the bush has been replaced, fully seat the new bush (7) in the slot in the
cover using a suitable drift and a press.
If the sealing ring (8) needs to be renewed, fit the new seal into the crankcase
cover, po ...