  The recent precise experimental results for the photoproduction of
$\eta$-mesons off the neutron measured with the Crystal Ball/TAPS calorimeter
at the MAMI accelerator have been investigated in detail in the framework of
the Bonn-Gatchina coupled channel model. The main result is that the narrow
structure observed in the excitation function of $\gamma n \rightarrow n\eta$
can be reproduced fully with a particular interference pattern in the
$J^P=1/2^-$ partial wave. Introduction of the narrow resonance $N(1685)$ with
the properties reported in earlier publications deteriorates the quality of the
fit.
