Ducati SUPERBIKE 1199 PANIGALE ABS Owner's Manual page 233

Attention
Using the vehicle set to FLAT (F) with a
passenger aboard may result in vehicle instability.
Ducati does not recommend to use the vehicle with
the rear suspension set to FLAT (F) and a passenger
aboard.
Important
The FLAT position (F) allows for different track
alignment, as on the racing versions. The
PROGRESSIVE position (P) is recommended with a
passenger aboard.
232
P
F
Fig 151