The dynamical analysis in the original paper was erroneous due to a mismatch in the choice of angular parameters. The calculations had been made by assuming a pole-on (sin i = 0) instead of an edge-on sin i = 1 orbit. In this framework, $\Omega_c-\Omega_b$ is just the mutual inclination between the orbital planes of the two planets. We also correct some stellar parameters given in the original paper (log g = +3.83, [Fe/H] updated = -0.26 ).
