[Q] downgrade xperia z2 from 4.4.4 to 4.4.2 topic

hello there !!
i want to downgrade my xperia z2 from 4.4.4 to 4.4.2 in order to make a root am already in 23.0.1.a.3.9
i think there is no mothode to root at the moment in fact its new branded (france-orange) model