We demonstrate that, while the proposed Gravitational
Dark-force Theory (of Nyambuya 2018a, hereafter Paper I) predicts
an extra-anomalous apsidal precession for Solar planets due
to the gravitational dark-force on the orbits of these planets, the
predicted extra-anomalous apsidal precession is so small — so
much that — it can not account for the observed extra-anomalous
apsidal precession of Solar planets. This null result is important
in that it informs us that whatever may be the cause of the extraanomalous
apsidal precession, it is not the proposed gravitational
dark-force.