  The psu(2,2|4) integrable super spin chain underlying the AdS/CFT
correspondence has integrable boundary states which describe set-ups where k
D3-branes get dissolved in a probe D5-brane. Overlaps between Bethe eigenstates
and these boundary states encode the one-point functions of conformal operators
and are expressed in terms of the superdeterminant of the Gaudin matrix that in
turn depends on the Dynkin diagram of the symmetry algebra. The different
possible Dynkin diagrams of super Lie algebras are related via fermionic
dualities and we determine how overlap formulae transform under these
dualities. As an application we show how to consistently move between overlap
formulae obtained for k=1 from different Dynkin diagrams.
