Hi, Sorry for the delay, I haven't seen your answer.
as there is bearings I still want to perfom this study with several solids.
I think I have found the solution to my problem, I will show you my procedure, if you think it is correct then I'll mark this topic "solved"
open the geometry in space claim and slice each solids so there is no more than one BC per face.
in static tructural, connect the sliced body together using "contact -->bonded"
Apply the BC conditions (supports and forces)
perform the simulation
enjoy your results without anys warning messages.
I hope my explanations are clear and moreover I hope my solution is correct